diff --git a/kmix/mixertoolbox.cpp b/kmix/mixertoolbox.cpp
index fafe8814..cd17196c 100644
--- a/kmix/mixertoolbox.cpp
+++ b/kmix/mixertoolbox.cpp
@@ -32,7 +32,16 @@
 
 #include "mixertoolbox.h"
 
+typedef Mixer_Backend *getMixerFunc( int device );
+typedef TQString getDriverNameFunc( );
 typedef DevIterator* getDevIteratorFunc( );
+
+struct MixerFactory {
+    getMixerFunc *getMixer;
+    getDriverNameFunc *getDriverName;
+    getDevIteratorFunc *getDevIterator;
+};
+
 extern MixerFactory g_mixerFactories[];
 
 /***********************************************************************************