diff --git a/src/mailers.c b/src/mailers.c
index 76d6a69..291064d 100644
--- a/src/mailers.c
+++ b/src/mailers.c
@@ -50,8 +50,7 @@
 			free_tcpcheck(rule, 1);
 		}
 		free_tcpcheck_vars(&alert->rules.preset_vars);
-		free(alert->rules.list);
-		alert->rules.list = NULL;
+		ha_free(&alert->rules.list);
 	}
 	pool_free(pool_head_email_alert, alert);
 }