diff --git a/src/ex_cmds2.c b/src/ex_cmds2.c
index c8980b4..2b2d635 100644
--- a/src/ex_cmds2.c
+++ b/src/ex_cmds2.c
@@ -1121,8 +1121,7 @@
     static void
 free_timer(timer_T *timer)
 {
-    vim_free(timer->tr_callback);
-    partial_unref(timer->tr_partial);
+    free_callback(timer->tr_callback, timer->tr_partial);
     vim_free(timer);
 }