diff --git a/js/src/jit/CompileInfo.h b/js/src/jit/CompileInfo.h
index 44848890c..f7f8c70bb 100644
--- a/js/src/jit/CompileInfo.h
+++ b/js/src/jit/CompileInfo.h
@@ -487,7 +487,7 @@ class CompileInfo
 
         // Function.arguments can be used to access all arguments in non-strict
         // scripts, so we can't optimize out any arguments.
-        if ((hasArguments() || !script()->strict()) &&
+        if ((mayReadFrameArgsDirectly_ || !script()->strict()) &&
             firstArgSlot() <= slot && slot - firstArgSlot() < nargs())
         {
             return true;