diff --git a/cpp_src/device/lasp_streammgr.cpp b/cpp_src/device/lasp_streammgr.cpp
index b92f21b..e8db813 100644
--- a/cpp_src/device/lasp_streammgr.cpp
+++ b/cpp_src/device/lasp_streammgr.cpp
@@ -447,7 +447,6 @@ void StreamMgr::stopStream(const StreamType t) {
       if (!_outputStream) {
         throw rte("Output stream is not running");
       }
-      Lck lck(_mtx);
       _outputStream.reset();
     }  // end else
   }