diff --git a/openbsc/src/libmgcp/mgcp_vty.c b/openbsc/src/libmgcp/mgcp_vty.c
index 4dd89b7..e8d6bde 100644
--- a/openbsc/src/libmgcp/mgcp_vty.c
+++ b/openbsc/src/libmgcp/mgcp_vty.c
@@ -1307,8 +1307,8 @@
 	struct mgcp_trunk_config *trunk;
 
 	cfg->osmux_port = OSMUX_PORT;
-	/* Default to 4 messages */
 	cfg->osmux_batch = 4;
+	cfg->osmux_batch_size = OSMUX_BATCH_DEFAULT_MAX;
 
 	g_cfg = cfg;
 	rc = vty_read_config_file(config_file, NULL);