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-rw-r--r--lib/System/Win32/DynamicLibrary.inc1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/System/Win32/DynamicLibrary.inc b/lib/System/Win32/DynamicLibrary.inc
index aa04268406..ceecb5c093 100644
--- a/lib/System/Win32/DynamicLibrary.inc
+++ b/lib/System/Win32/DynamicLibrary.inc
@@ -12,6 +12,7 @@
//===----------------------------------------------------------------------===//
#include "Win32.h"
+#include "llvm/System/RWMutex.h"
#ifdef __MINGW32__
#include <imagehlp.h>