diff --git a/drivers/net/hamradio/hdlcdrv.c b/drivers/net/hamradio/hdlcdrv.c
index ae9629fa6882bb1dd2181e804b9a881a6c49c962..c258a0586e611d641c134f53114c76df0025ec66 100644
--- a/drivers/net/hamradio/hdlcdrv.c
+++ b/drivers/net/hamradio/hdlcdrv.c
@@ -88,6 +88,7 @@
 static inline void append_crc_ccitt(unsigned char *buffer, int len)
 {
  	unsigned int crc = crc_ccitt(0xffff, buffer, len) ^ 0xffff;
+	buffer += len;
 	*buffer++ = crc;
 	*buffer++ = crc >> 8;
 }