diff --git a/mozilla/modules/plugin/base/public/nptypes.h b/mozilla/modules/plugin/base/public/nptypes.h
index fa7487fc789..a7ae681cd67 100644
--- a/mozilla/modules/plugin/base/public/nptypes.h
+++ b/mozilla/modules/plugin/base/public/nptypes.h
@@ -47,6 +47,6 @@ typedef unsigned int uint32_t;
 #else
 #include <stdint.h>
 #ifndef bool
-#define bool int
+typedef int bool;
 #endif
 #endif