diff --git a/drivers/char/drm/via_drm.h b/drivers/char/drm/via_drm.h
index 4588c9b..be346bb 100644
--- a/drivers/char/drm/via_drm.h
+++ b/drivers/char/drm/via_drm.h
@@ -158,7 +158,7 @@
 } drm_via_dma_init_t;
 
 typedef struct _drm_via_cmdbuffer {
-	char *buf;
+	char __user *buf;
 	unsigned long size;
 } drm_via_cmdbuffer_t;