1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/isdn/hardware/avm/b1pci.c b/drivers/isdn/hardware/avm/b1pci.c
index 90e2e6643d19..5b314a2c4049 100644
--- a/drivers/isdn/hardware/avm/b1pci.c
+++ b/drivers/isdn/hardware/avm/b1pci.c
@@ -382,9 +382,9 @@ static int __init b1pci_init(void)
         char rev[32];
         int err;
 
-        if ((p = strchr(revision, ':')) != 0 && p[1]) {
+        if ((p = strchr(revision, ':')) != NULL && p[1]) {
                 strlcpy(rev, p + 2, 32);
-                if ((p = strchr(rev, '$')) != 0 && p > rev)
+                if ((p = strchr(rev, '$')) != NULL && p > rev)
                    *(p-1) = 0;
         } else
                 strcpy(rev, "1.0");