1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/isdn/capi/capiutil.c b/drivers/isdn/capi/capiutil.c
index 22379b94e88f..ebef4ce1b00c 100644
--- a/drivers/isdn/capi/capiutil.c
+++ b/drivers/isdn/capi/capiutil.c
@@ -450,7 +450,7 @@ static void pars_2_message(_cmsg * cmsg)
                         cmsg->l += 4;
                         break;
                 case _CSTRUCT:
-                        if (*(u8 **) OFF == 0) {
+                        if (*(u8 **) OFF == NULL) {
                                 *(cmsg->m + cmsg->l) = '\0';
                                 cmsg->l++;
                         } else if (**(_cstruct *) OFF != 0xff) {