Added an extern "C" safeguard.
diff --git a/include/winbase.h b/include/winbase.h
index 47878fe..1f32748 100644
--- a/include/winbase.h
+++ b/include/winbase.h
@@ -3,6 +3,10 @@
#include "windows.h"
+#ifdef __cplusplus
+extern "C" {
+#endif
+
#define WAIT_FAILED 0xffffffff
#define WAIT_OBJECT_0 0
#define WAIT_ABANDONED STATUS_ABANDONED_WAIT_0
@@ -195,4 +199,8 @@
BOOL32 WINAPI TerminateProcess(HANDLE32,DWORD);
BOOL32 WINAPI TerminateThread(HANDLE32,DWORD);
+#ifdef __cplusplus
+}
+#endif
+
#endif /* __WINE_WINBASE_H */