diff --git a/src/script_opt/ProfileFunc.cc b/src/script_opt/ProfileFunc.cc
index 8c63977b56..29a0b02005 100644
--- a/src/script_opt/ProfileFunc.cc
+++ b/src/script_opt/ProfileFunc.cc
@@ -1438,7 +1438,7 @@ TraversalCode SetBlockLineNumbers::PreStmt(const Stmt* s) {
 
 TraversalCode SetBlockLineNumbers::PostStmt(const Stmt* s) {
     auto loc = const_cast<Location*>(s->GetLocationInfo());
-    auto& r = block_line_range.back();
+    auto r = block_line_range.back();
     loc->first_line = r.first;
     loc->last_line = r.second;