diff --git a/Source/JavaScriptCore/dfg/DFGFixupPhase.cpp b/Source/JavaScriptCore/dfg/DFGFixupPhase.cpp
index 27bb1ac..f4d80aa 100644
--- a/Source/JavaScriptCore/dfg/DFGFixupPhase.cpp
+++ b/Source/JavaScriptCore/dfg/DFGFixupPhase.cpp
@@ -1083,7 +1083,7 @@
     {
         unsigned attributesUnused;
         JSCell* specificValue;
-        PropertyOffset offset = stringPrototypeStructure->get(
+        PropertyOffset offset = stringPrototypeStructure->getConcurrently(
             vm(), ident, attributesUnused, specificValue);
         if (!isValidOffset(offset))
             return false;