diff --git a/src/modules/topos_redis/topos_redis_storage.c b/src/modules/topos_redis/topos_redis_storage.c
index 50e33121eea..bc810e702bd 100644
--- a/src/modules/topos_redis/topos_redis_storage.c
+++ b/src/modules/topos_redis/topos_redis_storage.c
@@ -1116,7 +1116,7 @@ int tps_redis_update_branch(sip_msg_t *msg, tps_data_t *md, tps_data_t *sd,
 		return -1;
 	}
 
-	if(md->s_method.len==6 && strncmp(md->s_method.s, "INVITE", 7)==0) {
+	if(md->s_method.len==6 && strncmp(md->s_method.s, "INVITE", 6)==0) {
 		if(tps_redis_insert_invite_branch(md)<0) {
 			LM_ERR("failed to insert INVITE extra branch data\n");
 			return -1;