diff --git a/mergetools/vimdiff b/mergetools/vimdiff
index a841ffdb49..10d86f3e19 100644
--- a/mergetools/vimdiff
+++ b/mergetools/vimdiff
@@ -42,3 +42,7 @@ translate_merge_tool_path() {
 		;;
 	esac
 }
+
+exit_code_trustable () {
+	true
+}