1 files changed, 4 insertions, 0 deletions
diff --git a/src/3rdparty/phonon/ds9/backend.h b/src/3rdparty/phonon/ds9/backend.h
index ad638f2..7c3c109 100644
--- a/src/3rdparty/phonon/ds9/backend.h
+++ b/src/3rdparty/phonon/ds9/backend.h
@@ -23,6 +23,7 @@ along with this library.  If not, see <http://www.gnu.org/licenses/>.
 #include <phonon/phononnamespace.h>
 
 #include <QtCore/QList>
+#include <QtCore/QMutex>
 
 #include "compointer.h"
 #include "backendnode.h"
@@ -63,6 +64,8 @@ namespace Phonon
 
             Filter getAudioOutputFilter(int index) const;
 
+            static QMutex *directShowMutex;
+
         Q_SIGNALS:
             void objectDescriptionChanged(ObjectDescriptionType);
 
@@ -74,6 +77,7 @@ namespace Phonon
             };
             mutable QVector<AudioMoniker> m_audioOutputs;
             mutable QVector<CLSID> m_audioEffects;
+            mutable QMutex m_directShowMutex;
         };
     }
 }