diff --git a/gcc/objc/objc.h b/gcc/objc/objc.h
index bdfa3c82eaf..e48b0fd5bfb 100644
--- a/gcc/objc/objc.h
+++ b/gcc/objc/objc.h
@@ -36,7 +36,11 @@ extern "C" {
 /*
 ** Definition of the boolean type.  
 */
+#ifdef __vxworks
+typedef int BOOL;
+#else
 typedef unsigned char  BOOL;
+#endif
 #define YES   (BOOL)1
 #define NO    (BOOL)0