diff --git a/llvm/include/llvm/Transforms/Vectorize/SandboxVectorizer/SeedCollector.h b/llvm/include/llvm/Transforms/Vectorize/SandboxVectorizer/SeedCollector.h
index 35410e18e8e75..273da3a87ee7c 100644
--- a/llvm/include/llvm/Transforms/Vectorize/SandboxVectorizer/SeedCollector.h
+++ b/llvm/include/llvm/Transforms/Vectorize/SandboxVectorizer/SeedCollector.h
@@ -159,7 +159,7 @@ template <typename LoadOrStoreT> class MemSeedBundle : public SeedBundle {
                                    cast<LoadOrStoreT>(I1), SE);
     };
     // Find the first element after I in mem. Then insert I before it.
-    insertAt(std::upper_bound(begin(), end(), I, Cmp), I);
+    insertAt(llvm::upper_bound(*this, I, Cmp), I);
   }
 };