diff --git a/test_main.cpp b/test_main.cpp
index 5c6c78e..8681375 100644
--- a/test_main.cpp
+++ b/test_main.cpp
@@ -550,7 +550,7 @@
 
     hidl_string one = "1";
     hidl_string two = "2";
-    Return<hidl_string> ret = Return<hidl_string>(Status::fromStatusT(DEAD_OBJECT));
+    const Return<hidl_string> ret = Return<hidl_string>(Status::fromStatusT(DEAD_OBJECT));
 
     EXPECT_EQ(one, Return<hidl_string>(one).withDefault(two));
     EXPECT_EQ(two, ret.withDefault(two));