diff --git a/rbs_lapd/rbs_sabm.c b/rbs_lapd/rbs_sabm.c
index d71ef49..9605f3b 100644
--- a/rbs_lapd/rbs_sabm.c
+++ b/rbs_lapd/rbs_sabm.c
@@ -7,7 +7,7 @@
 /* this program wants to be called with 'strace -s1024 -x' so you see the data
  * betewen DAHDI and it */
 
-const uint8_t sabme_frame_nonraw[] = { 0xFA, 0x7D, 0x7F };
+const uint8_t sabme_frame_nonraw[] = { 0xFA, 0x7D, 0x7F, 0x00, 0x00 };
 
 static int fd;
 static uint8_t dummy_buf[8192];