2 files changed, 6 insertions, 4 deletions
diff --git a/absl/synchronization/internal/pthread_waiter.h b/absl/synchronization/internal/pthread_waiter.h
index 206aefa4..23db76ad 100644
--- a/absl/synchronization/internal/pthread_waiter.h
+++ b/absl/synchronization/internal/pthread_waiter.h
@@ -16,7 +16,7 @@
 #ifndef ABSL_SYNCHRONIZATION_INTERNAL_PTHREAD_WAITER_H_
 #define ABSL_SYNCHRONIZATION_INTERNAL_PTHREAD_WAITER_H_
 
-#ifndef _WIN32
+#if !defined(_WIN32) && !defined(__MINGW32__)
 #include <pthread.h>
 
 #include "absl/base/config.h"
@@ -55,6 +55,6 @@ class PthreadWaiter : public WaiterCrtp<PthreadWaiter> {
 ABSL_NAMESPACE_END
 }  // namespace absl
 
-#endif  // ndef _WIN32
+#endif  // !defined(_WIN32) && !defined(__MINGW32__)
 
 #endif  // ABSL_SYNCHRONIZATION_INTERNAL_PTHREAD_WAITER_H_
diff --git a/absl/synchronization/internal/win32_waiter.h b/absl/synchronization/internal/win32_waiter.h
index 87eb617c..fdab264e 100644
--- a/absl/synchronization/internal/win32_waiter.h
+++ b/absl/synchronization/internal/win32_waiter.h
@@ -20,7 +20,8 @@
 #include <sdkddkver.h>
 #endif
 
-#if defined(_WIN32) && _WIN32_WINNT >= _WIN32_WINNT_VISTA
+#if defined(_WIN32) && !defined(__MINGW32__) && \
+    _WIN32_WINNT >= _WIN32_WINNT_VISTA
 
 #include "absl/base/config.h"
 #include "absl/synchronization/internal/kernel_timeout.h"
@@ -65,6 +66,7 @@ class Win32Waiter : public WaiterCrtp<Win32Waiter> {
 ABSL_NAMESPACE_END
 }  // namespace absl
 
-#endif  // defined(_WIN32) && _WIN32_WINNT >= _WIN32_WINNT_VISTA
+#endif  // defined(_WIN32) && !defined(__MINGW32__) &&
+        // _WIN32_WINNT >= _WIN32_WINNT_VISTA
 
 #endif  // ABSL_SYNCHRONIZATION_INTERNAL_WIN32_WAITER_H_