diff --git a/src/check.c b/src/check.c
index b49aca6..b1ffe5e 100644
--- a/src/check.c
+++ b/src/check.c
@@ -1253,7 +1253,8 @@
 		task_destroy(check->task);
 		t = NULL;
 
-		free_server(check->server);
+		if (check->server)
+			free_server(check->server);
 	}
 
 	return t;