diff --git a/drivers/isdn/mISDN/l1oip_codec.c b/drivers/isdn/mISDN/l1oip_codec.c
index 2ec4b28d9edc85aecf80c7007c3ea0f4038eb62a..e4ecba3d48dfcf75703aee66c5a443b9f39c2c62 100644
--- a/drivers/isdn/mISDN/l1oip_codec.c
+++ b/drivers/isdn/mISDN/l1oip_codec.c
@@ -331,7 +331,7 @@ l1oip_4bit_alloc(int ulaw)
 	/* 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;
 	}