diff --git a/openbsc/src/libmgcp/mgcp_protocol.c b/openbsc/src/libmgcp/mgcp_protocol.c
index d4088a1..1a88a84 100644
--- a/openbsc/src/libmgcp/mgcp_protocol.c
+++ b/openbsc/src/libmgcp/mgcp_protocol.c
@@ -621,7 +621,7 @@
 			if (audio_payload == -1)
 				break;
 
-			if (sscanf(line, "a=rtpmap:%d %64s",
+			if (sscanf(line, "a=rtpmap:%d %63s",
 				   &payload, audio_name) == 2) {
 				if (payload != audio_payload)
 					break;