diff --git a/library/std/src/os/unix/net/ancillary.rs b/library/std/src/os/unix/net/ancillary.rs
index a29008140f784..89d93ff8ac706 100644
--- a/library/std/src/os/unix/net/ancillary.rs
+++ b/library/std/src/os/unix/net/ancillary.rs
@@ -249,46 +249,53 @@ impl SocketCred {
     #[unstable(feature = "unix_socket_ancillary_data", issue = "76915")]
     #[must_use]
     pub fn new() -> SocketCred {
-        SocketCred(libc::cmsgcred { cmsgcred_pid: 0, cmsgcred_uid: 0, cmsgcred_gid: 0 })
+        SocketCred(libc::cmsgcred {
+            cmcred_pid: 0,
+            cmcred_uid: 0,
+            cmcred_euid: 0,
+            cmcred_gid: 0,
+            cmcred_ngroups: 0,
+            cmcred_groups: [0; libc::CMGROUP_MAX],
+        })
     }
 
     /// Set the PID.
     #[unstable(feature = "unix_socket_ancillary_data", issue = "76915")]
     pub fn set_pid(&mut self, pid: libc::pid_t) {
-        self.0.cmsgcred_pid = pid;
+        self.0.cmcred_pid = pid;
     }
 
     /// Get the current PID.
     #[must_use]
     #[unstable(feature = "unix_socket_ancillary_data", issue = "76915")]
     pub fn get_pid(&self) -> libc::pid_t {
-        self.0.cmsgcred_pid
+        self.0.cmcred_pid
     }
 
     /// Set the UID.
     #[unstable(feature = "unix_socket_ancillary_data", issue = "76915")]
     pub fn set_uid(&mut self, uid: libc::uid_t) {
-        self.0.cmsgcred_uid = uid;
+        self.0.cmcred_uid = uid;
     }
 
     /// Get the current UID.
     #[must_use]
     #[unstable(feature = "unix_socket_ancillary_data", issue = "76915")]
     pub fn get_uid(&self) -> libc::uid_t {
-        self.0.cmsgcred_uid
+        self.0.cmcred_uid
     }
 
     /// Set the GID.
     #[unstable(feature = "unix_socket_ancillary_data", issue = "76915")]
     pub fn set_gid(&mut self, gid: libc::gid_t) {
-        self.0.cmsgcred_gid = gid;
+        self.0.cmcred_gid = gid;
     }
 
     /// Get the current GID.
     #[must_use]
     #[unstable(feature = "unix_socket_ancillary_data", issue = "76915")]
     pub fn get_gid(&self) -> libc::gid_t {
-        self.0.cmsgcred_gid
+        self.0.cmcred_gid
     }
 }
 
@@ -340,7 +347,7 @@ pub enum AncillaryError {
 #[unstable(feature = "unix_socket_ancillary_data", issue = "76915")]
 pub enum AncillaryData<'a> {
     ScmRights(ScmRights<'a>),
-    #[cfg(any(doc, target_os = "android", target_os = "linux",))]
+    #[cfg(any(doc, target_os = "android", target_os = "linux", target_os = "dragonfly"))]
     ScmCredentials(ScmCredentials<'a>),
 }
 
@@ -363,7 +370,7 @@ impl<'a> AncillaryData<'a> {
     ///
     /// `data` must contain a valid control message and the control message must be type of
     /// `SOL_SOCKET` and level of `SCM_CREDENTIALS` or `SCM_CREDS`.
-    #[cfg(any(doc, target_os = "android", target_os = "linux",))]
+    #[cfg(any(doc, target_os = "android", target_os = "linux", target_os = "dragonfly"))]
     unsafe fn as_credentials(data: &'a [u8]) -> Self {
         let ancillary_data_iter = AncillaryDataIter::new(data);
         let scm_credentials = ScmCredentials(ancillary_data_iter);
diff --git a/library/std/src/os/unix/net/stream.rs b/library/std/src/os/unix/net/stream.rs
index 583f861a92535..e8b6a792219ca 100644
--- a/library/std/src/os/unix/net/stream.rs
+++ b/library/std/src/os/unix/net/stream.rs
@@ -415,7 +415,7 @@ impl UnixStream {
     ///     Ok(())
     /// }
     /// ```
-    #[cfg(any(doc, target_os = "android", target_os = "linux",))]
+    #[cfg(any(doc, target_os = "android", target_os = "linux", target_os = "dragonfly"))]
     #[unstable(feature = "unix_socket_ancillary_data", issue = "76915")]
     pub fn set_passcred(&self, passcred: bool) -> io::Result<()> {
         self.0.set_passcred(passcred)
@@ -427,7 +427,7 @@ impl UnixStream {
     /// Get the socket option `SO_PASSCRED`.
     ///
     /// [`set_passcred`]: UnixStream::set_passcred
-    #[cfg(any(doc, target_os = "android", target_os = "linux",))]
+    #[cfg(any(doc, target_os = "android", target_os = "linux", target_os = "dragonfly"))]
     #[unstable(feature = "unix_socket_ancillary_data", issue = "76915")]
     pub fn passcred(&self) -> io::Result<bool> {
         self.0.passcred()
diff --git a/library/std/src/sys/unix/net.rs b/library/std/src/sys/unix/net.rs
index 15d0dbe07fe7e..711169985e3d2 100644
--- a/library/std/src/sys/unix/net.rs
+++ b/library/std/src/sys/unix/net.rs
@@ -408,17 +408,30 @@ impl Socket {
         Ok(raw != 0)
     }
 
-    #[cfg(any(target_os = "android", target_os = "linux", target_os = "dragonfly",))]
+    #[cfg(any(target_os = "android", target_os = "linux"))]
     pub fn set_passcred(&self, passcred: bool) -> io::Result<()> {
         setsockopt(self, libc::SOL_SOCKET, libc::SO_PASSCRED, passcred as libc::c_int)
     }
 
-    #[cfg(any(target_os = "android", target_os = "linux", target_os = "dragonfly",))]
+    #[cfg(target_os = "dragonfly")]
+    pub fn set_passcred(&self, passcred: bool) -> io::Result<()> {
+        const SO_PASSCRED: libc::c_int = 0x4000;
+        setsockopt(self, libc::SOL_SOCKET, SO_PASSCRED, passcred as libc::c_int)
+    }
+
+    #[cfg(any(target_os = "android", target_os = "linux"))]
     pub fn passcred(&self) -> io::Result<bool> {
         let passcred: libc::c_int = getsockopt(self, libc::SOL_SOCKET, libc::SO_PASSCRED)?;
         Ok(passcred != 0)
     }
 
+    #[cfg(target_os = "dragonfly")]
+    pub fn passcred(&self) -> io::Result<bool> {
+        const SO_PASSCRED: libc::c_int = 0x4000;
+        let passcred: libc::c_int = getsockopt(self, libc::SOL_SOCKET, SO_PASSCRED)?;
+        Ok(passcred != 0)
+    }
+
     #[cfg(not(any(target_os = "solaris", target_os = "illumos")))]
     pub fn set_nonblocking(&self, nonblocking: bool) -> io::Result<()> {
         let mut nonblocking = nonblocking as libc::c_int;