diff --git a/libwvdrmengine/cdm/core/include/entitlement_key_session.h b/libwvdrmengine/cdm/core/include/entitlement_key_session.h
index 2c2f9b8c..d8fab403 100644
--- a/libwvdrmengine/cdm/core/include/entitlement_key_session.h
+++ b/libwvdrmengine/cdm/core/include/entitlement_key_session.h
@@ -21,7 +21,7 @@ class EntitlementKeySession : public ContentKeySession {
                         metrics::CryptoMetrics* metrics);
   ~EntitlementKeySession() override {}
 
-  KeySessionType Type() { return kEntitlement; }
+  KeySessionType Type() override { return kEntitlement; }
 
   // Load Keys for ContentKeySession
   OEMCryptoResult LoadKeys(const std::string& message,