diff --git a/apps/openmw/mwsound/openal_output.cpp b/apps/openmw/mwsound/openal_output.cpp
index 4bdbf01014..c7b16dd396 100644
--- a/apps/openmw/mwsound/openal_output.cpp
+++ b/apps/openmw/mwsound/openal_output.cpp
@@ -125,7 +125,7 @@ const ALfloat OpenAL_SoundStream::sBufferLength = 0.125f;
 struct OpenAL_Output::StreamThread {
     typedef std::vector<OpenAL_SoundStream*> StreamVec;
     StreamVec mStreams;
-    boost::mutex mMutex;
+    boost::recursive_mutex mMutex;
     boost::thread mThread;
 
     StreamThread()