diff --git a/drivers/isdn/capi/capidrv.c b/drivers/isdn/capi/capidrv.c
index 4921eae71acbfb0518069e1dd2913df1bda417ac..3e6d17f42a98309bcdcd11b0296d2ea606cc8e20 100644
--- a/drivers/isdn/capi/capidrv.c
+++ b/drivers/isdn/capi/capidrv.c
@@ -40,7 +40,7 @@ static int debugmode = 0;
 MODULE_DESCRIPTION("CAPI4Linux: Interface to ISDN4Linux");
 MODULE_AUTHOR("Carsten Paeth");
 MODULE_LICENSE("GPL");
-module_param(debugmode, uint, 0);
+module_param(debugmode, uint, S_IRUGO|S_IWUSR);
 
 /* -------- type definitions ----------------------------------------- */