diff --git a/js/src/nanojit/LIR.h b/js/src/nanojit/LIR.h
index 8093ade67fec..835152361e5b 100644
--- a/js/src/nanojit/LIR.h
+++ b/js/src/nanojit/LIR.h
@@ -786,7 +786,8 @@ namespace nanojit
             return isGuard() || isBranch() ||
                    (isCall() && !isCse()) ||
                    isStore() ||
-                   isop(LIR_label) || isop(LIR_live) || isop(LIR_regfence) ||
+                   isop(LIR_label) || isop(LIR_live) || isop(LIR_flive) ||
+                   isop(LIR_regfence) ||
                    isRet();
         }