diff --git a/llvm/include/llvm/Analysis/AliasAnalysis.h b/llvm/include/llvm/Analysis/AliasAnalysis.h
index 7f6fe5d94dc7a498b2fb11b0fd8ac6e96205eb2a..25e972bb5f9a34b95168d6e06046c1397ea62cd9 100644
--- a/llvm/include/llvm/Analysis/AliasAnalysis.h
+++ b/llvm/include/llvm/Analysis/AliasAnalysis.h
@@ -270,7 +270,9 @@ public:
   /// true.  For use when the call site is not known.
   ///
   static bool onlyReadsMemory(ModRefBehavior MRB) {
-    return MRB == DoesNotAccessMemory || MRB == OnlyReadsMemory;
+    return MRB == DoesNotAccessMemory ||
+           MRB == AccessesArgumentsReadonly ||
+           MRB == OnlyReadsMemory;
   }