diff --git a/mlir/lib/Dialect/Utils/StructuredOpsUtils.cpp b/mlir/lib/Dialect/Utils/StructuredOpsUtils.cpp
--- a/mlir/lib/Dialect/Utils/StructuredOpsUtils.cpp
+++ b/mlir/lib/Dialect/Utils/StructuredOpsUtils.cpp
@@ -118,7 +118,7 @@
 
 SmallVector<NamedAttribute>
 mlir::getPrunedAttributeList(Operation *op, ArrayRef<StringRef> elidedAttrs) {
-  llvm::StringSet elidedAttrsSet;
+  llvm::StringSet<> elidedAttrsSet;
   elidedAttrsSet.insert(elidedAttrs.begin(), elidedAttrs.end());
   SmallVector<NamedAttribute> attrs;
   for (auto attr : op->getAttrs()) {