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-rw-r--r--src/google/protobuf/stubs/atomicops.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/google/protobuf/stubs/atomicops.h b/src/google/protobuf/stubs/atomicops.h
index c9d86c5f..08474904 100644
--- a/src/google/protobuf/stubs/atomicops.h
+++ b/src/google/protobuf/stubs/atomicops.h
@@ -120,7 +120,9 @@ Atomic32 Release_CompareAndSwap(volatile Atomic32* ptr,
Atomic32 old_value,
Atomic32 new_value);
+#if defined(__MINGW32__) && defined(MemoryBarrier)
#undef MemoryBarrier
+#endif
void MemoryBarrier();
void NoBarrier_Store(volatile Atomic32* ptr, Atomic32 value);
void Acquire_Store(volatile Atomic32* ptr, Atomic32 value);