diff --git a/drivers/isdn/mISDN/l1oip_codec.c b/drivers/isdn/mISDN/l1oip_codec.c
index 2ec4b28..e4ecba3 100644
--- a/drivers/isdn/mISDN/l1oip_codec.c
+++ b/drivers/isdn/mISDN/l1oip_codec.c
@@ -331,7 +331,7 @@
 	/* alloc conversion tables */
 	table_com = vmalloc(65536);
 	table_dec = vmalloc(512);
-	if (!table_com | !table_dec) {
+	if (!table_com || !table_dec) {
 		l1oip_4bit_free();
 		return -ENOMEM;
 	}