diff --git a/src/libosmo-mgcp/mgcp_e1.c b/src/libosmo-mgcp/mgcp_e1.c
index 6d1f891..40f976b 100644
--- a/src/libosmo-mgcp/mgcp_e1.c
+++ b/src/libosmo-mgcp/mgcp_e1.c
@@ -361,7 +361,7 @@
 	/* Trigger sending of pending E1 traffic */
 	e1_send_ts_frame(ts, trunk);
 
-	/* e1inp_rx_ts() does not free() msgb */
+	/* e1inp_rx_ts(), the caller of this callback does not free() msgb. */
 	msgb_free(msg);
 }