diff --git a/clang/lib/CodeGen/BackendUtil.cpp b/clang/lib/CodeGen/BackendUtil.cpp
index f9855f0..4125d50 100644
--- a/clang/lib/CodeGen/BackendUtil.cpp
+++ b/clang/lib/CodeGen/BackendUtil.cpp
@@ -1293,7 +1293,7 @@
 
   // Save llvm.compiler.used and remote it.
   SmallVector<Constant*, 2> UsedArray;
-  SmallSet<GlobalValue*, 4> UsedGlobals;
+  SmallPtrSet<GlobalValue*, 4> UsedGlobals;
   Type *UsedElementType = Type::getInt8Ty(M->getContext())->getPointerTo(0);
   GlobalVariable *Used = collectUsedGlobalVariables(*M, UsedGlobals, true);
   for (auto *GV : UsedGlobals) {