Add override in vespalib module

1 files changed, 1 insertions, 1 deletions

diff --git a/vespalib/src/tests/dual_merge_director/dual_merge_director_test.cpp b/vespalib/src/tests/dual_merge_director/dual_merge_director_test.cpp
index b6621a75b84..ff1d5a1ef15 100644
--- a/vespalib/src/tests/dual_merge_director/dual_merge_director_test.cpp
+++ b/vespalib/src/tests/dual_merge_director/dual_merge_director_test.cpp
@@ -12,7 +12,7 @@ struct MySource : public DualMergeDirector::Source {
 
     MySource(bool a, size_t num_sources, size_t source_id);
     ~MySource();
-    virtual void merge(Source &mt) {
+    void merge(Source &mt) override {
         MySource &rhs = static_cast<MySource&>(mt);
         ASSERT_EQUAL(typeA, rhs.typeA);
         ASSERT_EQUAL(data.size(), rhs.data.size());