1 files changed, 1 insertions, 1 deletions
diff --git a/test/cpp/util/string_ref_test.cc b/test/cpp/util/string_ref_test.cc
index 8f7986e64e..031ec33241 100644
--- a/test/cpp/util/string_ref_test.cc
+++ b/test/cpp/util/string_ref_test.cc
@@ -60,7 +60,7 @@ TEST_F(StringRefTest, FromString) {
 TEST_F(StringRefTest, CopyConstructor) {
   string_ref s1(kTestString);
   ;
-  string_ref s2(s1);
+  const string_ref& s2(s1);
   EXPECT_EQ(s1.length(), s2.length());
   EXPECT_EQ(s1.data(), s2.data());
 }