1 files changed, 1 insertions, 1 deletions
diff --git a/src/mongo/db/query/canonical_query_test.cpp b/src/mongo/db/query/canonical_query_test.cpp
index 359a46ff35a..79146bb12b1 100644
--- a/src/mongo/db/query/canonical_query_test.cpp
+++ b/src/mongo/db/query/canonical_query_test.cpp
@@ -337,7 +337,7 @@ namespace {
                              const char* projStr,
                              const char *expectedStr) {
         auto_ptr<CanonicalQuery> cq(canonicalize(queryStr, sortStr, projStr));
-        PlanCacheKey key = cq->getPlanCacheKey();
+        const PlanCacheKey& key = cq->getPlanCacheKey();
         PlanCacheKey expectedKey(expectedStr);
         if (key == expectedKey) {
             return;