diff --git a/src/core/library/Indexer.h b/src/core/library/Indexer.h
index 35f91841f..c997bd2c9 100644
--- a/src/core/library/Indexer.h
+++ b/src/core/library/Indexer.h
@@ -79,7 +79,7 @@ namespace musik { namespace core {
             virtual State GetState() override { return this->state; }
 
             /* IIndexerWriter */
-            virtual musik::core::sdk::ITagStore* CreateWriter();
+            virtual musik::core::sdk::ITagStore* CreateWriter() override;
             virtual bool RemoveByUri(musik::core::sdk::IIndexerSource* source, const char* uri) override;
             virtual bool RemoveByExternalId(musik::core::sdk::IIndexerSource* source, const char* id) override;
             virtual int RemoveAll(musik::core::sdk::IIndexerSource* source) override;
diff --git a/src/core/sdk/ISchema.h b/src/core/sdk/ISchema.h
index 36d5916b8..1261bb233 100644
--- a/src/core/sdk/ISchema.h
+++ b/src/core/sdk/ISchema.h
@@ -125,7 +125,7 @@ namespace musik { namespace core { namespace sdk {
                 return entries.size();
             }
 
-            virtual const Entry* At(size_t index) {
+            virtual const Entry* At(size_t index) override {
                 return entries[index];
             }