diff --git a/api/test/mock_transformable_video_frame.h b/api/test/mock_transformable_video_frame.h
index d326b2f8a8..a848032dd3 100644
--- a/api/test/mock_transformable_video_frame.h
+++ b/api/test/mock_transformable_video_frame.h
@@ -36,6 +36,10 @@ class MockTransformableVideoFrame
               (const webrtc::VideoFrameMetadata&),
               (override));
   MOCK_METHOD(uint8_t, GetPayloadType, (), (const, override));
+  MOCK_METHOD(TransformableFrameInterface::Direction,
+              GetDirection,
+              (),
+              (const, override));
 };
 
 static_assert(!std::is_abstract_v<MockTransformableVideoFrame>, "");