diff --git a/clang/lib/Interpreter/CMakeLists.txt b/clang/lib/Interpreter/CMakeLists.txt
index 84f6ca5271d2a..9065f998f73c4 100644
--- a/clang/lib/Interpreter/CMakeLists.txt
+++ b/clang/lib/Interpreter/CMakeLists.txt
@@ -38,3 +38,14 @@ add_clang_library(clangInterpreter
   clangSema
   clangSerialization
   )
+
+if ((MINGW OR CYGWIN) AND BUILD_SHARED_LIBS)
+  # The DLLs are supposed to export all symbols (except for ones that are
+  # explicitly hidden). Normally, this is what happens anyway, but if there
+  # are symbols that are marked explicitly as dllexport, we'd only export them
+  # and nothing else. The Interpreter contains a few cases of such dllexports
+  # (for symbols that need to be exported even from standalone exe files);
+  # therefore, add --export-all-symbols to make sure we export all symbols
+  # despite potential dllexports.
+  target_link_options(clangInterpreter PRIVATE LINKER:--export-all-symbols)
+endif()