diff --git a/util/RTCContext.cpp b/util/RTCContext.cpp
index c681ce3..d768c28 100644
--- a/util/RTCContext.cpp
+++ b/util/RTCContext.cpp
@@ -68,6 +68,7 @@ void RTCContext::onAudioProcess(const char* roomId, const char* peerId,
         std::cerr << "Python interpreter not initialized" << std::endl;
         return;
     }
+    boost::python::gil_scoped_acquire gil;
     PyGILState_STATE gstate = PyGILState_Ensure();
 
     try {