diff --git a/Sources/Foundation/CGFloat.swift b/Sources/Foundation/CGFloat.swift
index c59977f88a..425ab259fe 100644
--- a/Sources/Foundation/CGFloat.swift
+++ b/Sources/Foundation/CGFloat.swift
@@ -8,7 +8,7 @@
 //
 
 #if canImport(Android)
-import Android
+@preconcurrency import Android
 #endif
 
 @frozen
diff --git a/Sources/Foundation/FileHandle.swift b/Sources/Foundation/FileHandle.swift
index 7a985f2ef8..191348df7d 100644
--- a/Sources/Foundation/FileHandle.swift
+++ b/Sources/Foundation/FileHandle.swift
@@ -20,12 +20,12 @@ fileprivate let _read = Darwin.read(_:_:_:)
 fileprivate let _write = Darwin.write(_:_:_:)
 fileprivate let _close = Darwin.close(_:)
 #elseif canImport(Glibc)
-import Glibc
+@preconcurrency import Glibc
 fileprivate let _read = Glibc.read(_:_:_:)
 fileprivate let _write = Glibc.write(_:_:_:)
 fileprivate let _close = Glibc.close(_:)
 #elseif canImport(Musl)
-import Musl
+@preconcurrency import Musl
 fileprivate let _read = Musl.read(_:_:_:)
 fileprivate let _write = Musl.write(_:_:_:)
 fileprivate let _close = Musl.close(_:)
@@ -35,7 +35,7 @@ fileprivate let _read = WASILibc.read(_:_:_:)
 fileprivate let _write = WASILibc.write(_:_:_:)
 fileprivate let _close = WASILibc.close(_:)
 #elseif canImport(Android)
-import Android
+@preconcurrency import Android
 fileprivate let _read = Android.read(_:_:_:)
 fileprivate let _write = Android.write(_:_:_:)
 fileprivate let _close = Android.close(_:)
diff --git a/Sources/Foundation/FileManager+POSIX.swift b/Sources/Foundation/FileManager+POSIX.swift
index e51aba6e72..c16f9b3956 100644
--- a/Sources/Foundation/FileManager+POSIX.swift
+++ b/Sources/Foundation/FileManager+POSIX.swift
@@ -8,7 +8,7 @@
 #if !os(Windows)
 
 #if canImport(Android)
-import Android
+@preconcurrency import Android
 #endif
 
 #if os(Android) && (arch(i386) || arch(arm)) // struct stat.st_mode is UInt32
diff --git a/Sources/Foundation/FileManager.swift b/Sources/Foundation/FileManager.swift
index 54864b85b4..f5dd433579 100644
--- a/Sources/Foundation/FileManager.swift
+++ b/Sources/Foundation/FileManager.swift
@@ -22,7 +22,7 @@ import WinSDK
 #if os(WASI)
 import WASILibc
 #elseif canImport(Bionic)
-import Bionic
+@preconcurrency import Bionic
 #endif
 
 #if os(Windows)
diff --git a/Sources/Foundation/Host.swift b/Sources/Foundation/Host.swift
index 7b72fb6b10..1a4aeb415e 100644
--- a/Sources/Foundation/Host.swift
+++ b/Sources/Foundation/Host.swift
@@ -13,7 +13,7 @@ import WinSDK
 #endif
 
 #if canImport(Android)
-    import Android
+    @preconcurrency import Android
     // Android Bionic differs a little with respect to the Linux Glibc.
 
     // IFF_LOOPBACK is part of the enumeration net_device_flags, which needs to
diff --git a/Sources/Foundation/NSData.swift b/Sources/Foundation/NSData.swift
index 65eb0d93e2..1a076beff7 100644
--- a/Sources/Foundation/NSData.swift
+++ b/Sources/Foundation/NSData.swift
@@ -12,7 +12,7 @@
 import Dispatch
 #endif
 #if canImport(Android)
-import Android
+@preconcurrency import Android
 #endif
 
 extension NSData {
diff --git a/Sources/Foundation/NSError.swift b/Sources/Foundation/NSError.swift
index 5d9d78672f..d6a4d1868c 100644
--- a/Sources/Foundation/NSError.swift
+++ b/Sources/Foundation/NSError.swift
@@ -13,11 +13,11 @@
 #if canImport(Darwin)
 import Darwin
 #elseif canImport(Glibc)
-import Glibc
+@preconcurrency import Glibc
 #elseif canImport(CRT)
 import CRT
 #elseif canImport(Android)
-import Android
+@preconcurrency import Android
 #endif
 
 @_implementationOnly import CoreFoundation
diff --git a/Sources/Foundation/NSLock.swift b/Sources/Foundation/NSLock.swift
index 5a2d06bfe0..938074d9e5 100644
--- a/Sources/Foundation/NSLock.swift
+++ b/Sources/Foundation/NSLock.swift
@@ -10,9 +10,9 @@
 @_implementationOnly import CoreFoundation
 
 #if canImport(Glibc)
-import Glibc
+@preconcurrency import Glibc
 #elseif canImport(Bionic)
-import Bionic
+@preconcurrency import Bionic
 #endif
 
 #if os(Windows)
diff --git a/Sources/Foundation/NSPathUtilities.swift b/Sources/Foundation/NSPathUtilities.swift
index ba8a48fad3..0c1c163adc 100644
--- a/Sources/Foundation/NSPathUtilities.swift
+++ b/Sources/Foundation/NSPathUtilities.swift
@@ -11,7 +11,7 @@
 #if os(Windows)
 import WinSDK
 #elseif canImport(Android)
-import Android
+@preconcurrency import Android
 #elseif os(WASI)
 import WASILibc
 #endif
diff --git a/Sources/Foundation/NSPlatform.swift b/Sources/Foundation/NSPlatform.swift
index 6a4636453a..522375bef9 100644
--- a/Sources/Foundation/NSPlatform.swift
+++ b/Sources/Foundation/NSPlatform.swift
@@ -11,7 +11,7 @@
 fileprivate let _NSPageSize = Int(vm_page_size)
 #elseif os(Linux) || os(Android) || os(OpenBSD) || os(FreeBSD)
 #if canImport(Android)
-import Android
+@preconcurrency import Android
 #endif
 
 fileprivate let _NSPageSize = Int(getpagesize())
diff --git a/Sources/Foundation/NSSwiftRuntime.swift b/Sources/Foundation/NSSwiftRuntime.swift
index 1509c31d71..1276a03b80 100644
--- a/Sources/Foundation/NSSwiftRuntime.swift
+++ b/Sources/Foundation/NSSwiftRuntime.swift
@@ -16,11 +16,11 @@ internal import Synchronization
 #if os(macOS) || os(iOS) || os(tvOS) || os(watchOS)
 @_exported import Darwin
 #elseif canImport(Glibc)
-@_exported import Glibc
+@_exported @preconcurrency import Glibc
 #elseif canImport(Musl)
-@_exported import Musl
+@_exported @preconcurrency import Musl
 #elseif canImport(Bionic)
-@_exported import Bionic
+@_exported @preconcurrency import Bionic
 #elseif os(WASI)
 @_exported import WASILibc
 #elseif os(Windows)
diff --git a/Sources/Foundation/NSURL.swift b/Sources/Foundation/NSURL.swift
index a9972c1ac2..88f6cd1108 100644
--- a/Sources/Foundation/NSURL.swift
+++ b/Sources/Foundation/NSURL.swift
@@ -19,11 +19,11 @@ internal let kCFURLWindowsPathStyle = CFURLPathStyle.cfurlWindowsPathStyle
 #if canImport(Darwin)
 import Darwin
 #elseif canImport(Glibc)
-import Glibc
+@preconcurrency import Glibc
 #elseif canImport(Musl)
-import Musl
+@preconcurrency import Musl
 #elseif canImport(Bionic)
-import Bionic
+@preconcurrency import Bionic
 #endif
 
 // NOTE: this represents PLATFORM_PATH_STYLE
diff --git a/Sources/Foundation/Port.swift b/Sources/Foundation/Port.swift
index be7374a9a8..7dc582b3bb 100644
--- a/Sources/Foundation/Port.swift
+++ b/Sources/Foundation/Port.swift
@@ -108,19 +108,19 @@ fileprivate let FOUNDATION_IPPROTO_TCP = IPPROTO_TCP
 #endif
 
 #if canImport(Glibc) && !os(OpenBSD) && !os(FreeBSD)
-import Glibc
+@preconcurrency import Glibc
 fileprivate let FOUNDATION_SOCK_STREAM = Int32(SOCK_STREAM.rawValue)
 fileprivate let FOUNDATION_IPPROTO_TCP = Int32(IPPROTO_TCP)
 #endif
 
 #if canImport(Musl)
-import Musl
+@preconcurrency import Musl
 fileprivate let FOUNDATION_SOCK_STREAM = Int32(SOCK_STREAM)
 fileprivate let FOUNDATION_IPPROTO_TCP = Int32(IPPROTO_TCP)
 #endif
 
 #if canImport(Glibc) && (os(OpenBSD) || os(FreeBSD))
-import Glibc
+@preconcurrency import Glibc
 fileprivate let FOUNDATION_SOCK_STREAM = Int32(SOCK_STREAM)
 fileprivate let FOUNDATION_IPPROTO_TCP = Int32(IPPROTO_TCP)
 fileprivate let INADDR_ANY: in_addr_t = 0
@@ -128,7 +128,7 @@ fileprivate let INADDR_LOOPBACK = 0x7f000001
 #endif
 
 #if canImport(Android)
-import Android
+@preconcurrency import Android
 fileprivate let FOUNDATION_SOCK_STREAM = Int32(Android.SOCK_STREAM)
 fileprivate let FOUNDATION_IPPROTO_TCP = Int32(Android.IPPROTO_TCP)
 fileprivate let INADDR_ANY: in_addr_t = 0
diff --git a/Sources/Foundation/Process.swift b/Sources/Foundation/Process.swift
index c3730cddf8..5bd3aabc5b 100644
--- a/Sources/Foundation/Process.swift
+++ b/Sources/Foundation/Process.swift
@@ -19,7 +19,7 @@ import struct WinSDK.HANDLE
 #if canImport(Darwin)
 import Darwin
 #elseif canImport(Android)
-import Android
+@preconcurrency import Android
 #endif
 
 internal import Synchronization
diff --git a/Sources/Foundation/Thread.swift b/Sources/Foundation/Thread.swift
index 4b9f3d1ddb..ac1aa0eed4 100644
--- a/Sources/Foundation/Thread.swift
+++ b/Sources/Foundation/Thread.swift
@@ -14,11 +14,11 @@ import WinSDK
 #endif
 
 #if canImport(Glibc)
-import Glibc
+@preconcurrency import Glibc
 #elseif canImport(Musl)
-import Musl
+@preconcurrency import Musl
 #elseif canImport(Bionic)
-import Bionic
+@preconcurrency import Bionic
 #endif
 
 // WORKAROUND_SR9811
diff --git a/Sources/FoundationNetworking/HTTPCookie.swift b/Sources/FoundationNetworking/HTTPCookie.swift
index 237c1daf55..18a62776bb 100644
--- a/Sources/FoundationNetworking/HTTPCookie.swift
+++ b/Sources/FoundationNetworking/HTTPCookie.swift
@@ -16,7 +16,7 @@ import Foundation
 #if os(Windows)
 import WinSDK
 #elseif canImport(Android)
-import Android
+@preconcurrency import Android
 #endif
 
 public struct HTTPCookiePropertyKey : RawRepresentable, Equatable, Hashable, Sendable {
diff --git a/Sources/Testing/Testing.swift b/Sources/Testing/Testing.swift
index 2483c14ed6..601f9e28a5 100644
--- a/Sources/Testing/Testing.swift
+++ b/Sources/Testing/Testing.swift
@@ -8,11 +8,11 @@
 //
 
 #if canImport(Glibc)
-import Glibc
+@preconcurrency import Glibc
 #elseif canImport(Musl)
-import Musl
+@preconcurrency import Musl
 #elseif canImport(Bionic)
-import Bionic
+@preconcurrency import Bionic
 #elseif os(WASI)
 import WASILibc
 #elseif canImport(CRT)
diff --git a/Sources/XCTest/Public/XCTestMain.swift b/Sources/XCTest/Public/XCTestMain.swift
index e19184e69f..2cfefbdbb5 100644
--- a/Sources/XCTest/Public/XCTestMain.swift
+++ b/Sources/XCTest/Public/XCTestMain.swift
@@ -27,7 +27,7 @@
 #if canImport(Darwin)
     import Darwin
 #elseif canImport(Glibc)
-    import Glibc
+    @preconcurrency import Glibc
 #endif
 
 /// Starts a test run for the specified test cases.
diff --git a/Sources/plutil/main.swift b/Sources/plutil/main.swift
index 29584596d3..34b1d5e332 100644
--- a/Sources/plutil/main.swift
+++ b/Sources/plutil/main.swift
@@ -11,13 +11,13 @@ import Darwin
 import SwiftFoundation
 #elseif canImport(Glibc)
 import Foundation
-import Glibc
+@preconcurrency import Glibc
 #elseif canImport(Musl)
 import Foundation
-import Musl
+@preconcurrency import Musl
 #elseif canImport(Bionic)
 import Foundation
-import Bionic
+@preconcurrency import Bionic
 #elseif canImport(CRT)
 import Foundation
 import CRT
diff --git a/Sources/xdgTestHelper/main.swift b/Sources/xdgTestHelper/main.swift
index fb037e2435..769ac33882 100644
--- a/Sources/xdgTestHelper/main.swift
+++ b/Sources/xdgTestHelper/main.swift
@@ -20,7 +20,7 @@ import FoundationNetworking
 #if os(Windows)
 import WinSDK
 #elseif canImport(Android)
-import Android
+@preconcurrency import Android
 #endif
 
 enum HelperCheckStatus : Int32 {
diff --git a/Tests/Foundation/FTPServer.swift b/Tests/Foundation/FTPServer.swift
index 8328a7ff7e..8a27a210b2 100644
--- a/Tests/Foundation/FTPServer.swift
+++ b/Tests/Foundation/FTPServer.swift
@@ -12,11 +12,11 @@
 import Dispatch
 
 #if canImport(Glibc)
-    import Glibc
+    @preconcurrency import Glibc
 #elseif canImport(Darwin)
     import Darwin
 #elseif canImport(Android)
-    import Android
+    @preconcurrency import Android
 #endif
 
 final class ServerSemaphore : Sendable {
diff --git a/Tests/Foundation/HTTPServer.swift b/Tests/Foundation/HTTPServer.swift
index f5459ff4b3..a6457f285f 100644
--- a/Tests/Foundation/HTTPServer.swift
+++ b/Tests/Foundation/HTTPServer.swift
@@ -20,9 +20,9 @@ import Dispatch
 #elseif canImport(Darwin)
     import Darwin
 #elseif canImport(Glibc)
-    import Glibc
+    @preconcurrency import Glibc
 #elseif canImport(Android)
-    import Android
+    @preconcurrency import Android
 #endif
 
 #if !os(Windows)
diff --git a/Tests/Foundation/TestFileHandle.swift b/Tests/Foundation/TestFileHandle.swift
index 8650c207e2..aa36f3ccde 100644
--- a/Tests/Foundation/TestFileHandle.swift
+++ b/Tests/Foundation/TestFileHandle.swift
@@ -20,7 +20,7 @@ import Dispatch
 #if os(Windows)
 import WinSDK
 #elseif canImport(Android)
-import Android
+@preconcurrency import Android
 #endif
 
 class TestFileHandle : XCTestCase {
diff --git a/Tests/Foundation/TestNSData.swift b/Tests/Foundation/TestNSData.swift
index fc829994c7..83a6bbadde 100644
--- a/Tests/Foundation/TestNSData.swift
+++ b/Tests/Foundation/TestNSData.swift
@@ -11,7 +11,7 @@ import XCTest
 @testable import Foundation
 
 #if canImport(Android)
-import Android
+@preconcurrency import Android
 #endif
 
 class TestNSData: XCTestCase {
diff --git a/Tests/Foundation/TestProcess.swift b/Tests/Foundation/TestProcess.swift
index 219ae8b658..caa1fa9d20 100644
--- a/Tests/Foundation/TestProcess.swift
+++ b/Tests/Foundation/TestProcess.swift
@@ -9,7 +9,7 @@
 
 import Synchronization
 #if canImport(Android)
-import Android
+@preconcurrency import Android
 #endif
 
 class TestProcess : XCTestCase {
diff --git a/Tests/Foundation/TestSocketPort.swift b/Tests/Foundation/TestSocketPort.swift
index 0a6ec281a9..521d809b25 100644
--- a/Tests/Foundation/TestSocketPort.swift
+++ b/Tests/Foundation/TestSocketPort.swift
@@ -9,7 +9,7 @@
 #if os(Windows)
 import WinSDK
 #elseif canImport(Android)
-import Android
+@preconcurrency import Android
 #endif
 
 class TestPortDelegateWithBlock: NSObject, PortDelegate {
diff --git a/Tests/Foundation/TestURL.swift b/Tests/Foundation/TestURL.swift
index cfd5eb258f..36f9e38f67 100644
--- a/Tests/Foundation/TestURL.swift
+++ b/Tests/Foundation/TestURL.swift
@@ -8,7 +8,7 @@
 //
 
 #if canImport(Android)
-import Android
+@preconcurrency import Android
 #endif
 
 let kURLTestParsingTestsKey = "ParsingTests"