diff --git a/app/src/decoder.h b/app/src/decoder.h
index 610de000..f266d9ba 100644
--- a/app/src/decoder.h
+++ b/app/src/decoder.h
@@ -18,7 +18,6 @@ struct decoder {
     struct frames *frames;
     socket_t video_socket;
     SDL_Thread *thread;
-    SDL_mutex *mutex;
     struct recorder *recorder;
     struct receiver_state {
         // meta (in order) for frames not consumed yet