diff --git a/mozilla/modules/plugin/base/public/nptypes.h b/mozilla/modules/plugin/base/public/nptypes.h
index 94977034ae5..fa7487fc789 100644
--- a/mozilla/modules/plugin/base/public/nptypes.h
+++ b/mozilla/modules/plugin/base/public/nptypes.h
@@ -46,4 +46,7 @@ typedef int int32_t;
 typedef unsigned int uint32_t;
 #else
 #include <stdint.h>
+#ifndef bool
+#define bool int
+#endif
 #endif