diff --git a/src/rtmp_manager.cpp b/src/rtmp_manager.cpp
index 57f5dfd..838de22 100644
--- a/src/rtmp_manager.cpp
+++ b/src/rtmp_manager.cpp
@@ -184,6 +184,7 @@ void RTMPManager::stream_loop(Camera cam, StreamType type, StreamContext *ctx)
     {
         res.result = 1;
         res.reason = "Failed to create pipeline";
+        bool expected = false;
         if (ctx->start_result_set.compare_exchange_strong(expected, true)) ctx->start_result.set_value(res);
         return;
     }