--- mozilla/js/src/js-confdefs.h.in~
+++ mozilla/js/src/js-confdefs.h.in
@@ -12,6 +12,7 @@
  * C++ implementations should define these macros only when __STDC_LIMIT_MACROS
  * is defined before <stdint.h> is included. */
 #define __STDC_LIMIT_MACROS
+#define __STDC_CONSTANT_MACROS
 
 #endif /* _JS_CONFDEFS_H_ */