diff --git a/src/fsm.c b/src/fsm.c
index 049663d..67db182 100644
--- a/src/fsm.c
+++ b/src/fsm.c
@@ -318,6 +318,9 @@
 		return -EPERM;
 	}
 
+	/* delete the old timer */
+	osmo_timer_del(&fi->timer);
+
 	if (st->onleave)
 		st->onleave(fi, new_state);