diff --git a/js/xpconnect/src/xpcprivate.h b/js/xpconnect/src/xpcprivate.h
index 6bad085977a..c87ba632c79 100644
--- a/js/xpconnect/src/xpcprivate.h
+++ b/js/xpconnect/src/xpcprivate.h
@@ -185,7 +185,6 @@
 #define XPC_TRACK_PROTO_STATS
 #define XPC_CHECK_WRAPPERS_AT_SHUTDOWN
 #define XPC_REPORT_SHADOWED_WRAPPED_NATIVE_MEMBERS
-#define XPC_CHECK_CLASSINFO_CLAIMS
 #endif
 
 /***************************************************************************/