diff --git a/sys/dev/raid/hptrr/hptrr_osm_bsd.c b/sys/dev/raid/hptrr/hptrr_osm_bsd.c
--- a/sys/dev/raid/hptrr/hptrr_osm_bsd.c
+++ b/sys/dev/raid/hptrr/hptrr_osm_bsd.c
@@ -1233,7 +1233,7 @@
 	caddr_t data = ap->a_data;
 	PHPT_IOCTL_PARAM piop=(PHPT_IOCTL_PARAM)data;
 	IOCTL_ARG ioctl_args;
-	HPT_U32 bytesReturned;
+	HPT_U32 bytesReturned = 0;
 
 	switch (cmd){
 	case HPT_DO_IOCONTROL: