diff --git a/compiler/optimizing/nodes.cc b/compiler/optimizing/nodes.cc
index d243331..50ce755 100644
--- a/compiler/optimizing/nodes.cc
+++ b/compiler/optimizing/nodes.cc
@@ -2892,8 +2892,7 @@
 }
 
 bool HNewInstance::IsStringAlloc() const {
-  ScopedObjectAccess soa(Thread::Current());
-  return GetReferenceTypeInfo().IsStringClass();
+  return GetEntrypoint() == kQuickAllocStringObject;
 }
 
 bool HInvoke::NeedsEnvironment() const {