diff --git a/mlir/lib/Dialect/SCF/TransformOps/SCFTransformOps.cpp b/mlir/lib/Dialect/SCF/TransformOps/SCFTransformOps.cpp
index 213e1fd4176c5..7910e83eac981 100644
--- a/mlir/lib/Dialect/SCF/TransformOps/SCFTransformOps.cpp
+++ b/mlir/lib/Dialect/SCF/TransformOps/SCFTransformOps.cpp
@@ -167,7 +167,7 @@ loopScheduling(scf::ForOp forOp,
     opCycles[&op] = earlyCycle;
     wrappedSchedule[earlyCycle % iterationInterval].push_back(&op);
   }
-  for (auto it : wrappedSchedule) {
+  for (const auto &it : wrappedSchedule) {
     for (Operation *op : it.second) {
       unsigned cycle = opCycles[op];
       schedule.push_back(std::make_pair(op, cycle / iterationInterval));