diff --git a/libcxx/include/__config b/libcxx/include/__config
--- a/libcxx/include/__config
+++ b/libcxx/include/__config
@@ -1072,8 +1072,7 @@
       defined(__APPLE__) || \
       defined(__sun__) || \
       defined(__MVS__) || \
-      defined(_AIX) || \
-      (defined(__MINGW32__) && __has_include(<pthread.h>))
+      defined(_AIX)
 #    define _LIBCPP_HAS_THREAD_API_PTHREAD
 #  elif defined(__Fuchsia__)
      // TODO(44575): Switch to C11 thread API when possible.