diff --git a/llvm/lib/IR/DebugInfo.cpp b/llvm/lib/IR/DebugInfo.cpp
index 254b6fe563e37d..190b220dc9aa72 100644
--- a/llvm/lib/IR/DebugInfo.cpp
+++ b/llvm/lib/IR/DebugInfo.cpp
@@ -647,7 +647,7 @@ bool llvm::stripNonLineTableDebugInfo(Module &M) {
     }
     for (auto &BB : F) {
       for (auto &I : BB) {
-        auto remapDebugLoc = [&](DebugLoc DL) -> DebugLoc {
+        auto remapDebugLoc = [&](const DebugLoc &DL) -> DebugLoc {
           auto *Scope = DL.getScope();
           MDNode *InlinedAt = DL.getInlinedAt();
           Scope = remap(Scope);