1 files changed, 1 insertions, 0 deletions

diff --git a/uisimulator/win32/thread-win32.h b/uisimulator/win32/thread-win32.h
index 2d26b8db21..467c47ee39 100644
--- a/uisimulator/win32/thread-win32.h
+++ b/uisimulator/win32/thread-win32.h
@@ -20,3 +20,4 @@
 extern HANDLE               lpThreads[256];
 extern int                  nPos,
                             nThreads;
+extern CRITICAL_SECTION     CriticalSection;