diff --git a/include/PR/os.h b/include/PR/os.h
index d6ec937a..073232e7 100644
--- a/include/PR/os.h
+++ b/include/PR/os.h
@@ -877,7 +877,7 @@ extern int		osStopTimer(OSTimer *);
 
 /* Controller interface */
 
-extern s32		osContInit(OSMesgQueue *, u8 *, OSContStatus *);
+extern s32		osContInit(OSMesgQueue * mq, u8 * bitpattern, OSContStatus * data);
 extern s32		osContReset(OSMesgQueue *, OSContStatus *);
 extern s32		osContStartQuery(OSMesgQueue *);
 extern s32		osContStartReadData(OSMesgQueue *);