From 7bb0f3233205d68e12081fb6a90ce0429663a89f Mon Sep 17 00:00:00 2001
From: Harshavardhana <harsha@minio.io>
Date: Tue, 9 Apr 2024 01:17:49 -0700
Subject: [PATCH] make if-none-match PUT/POST RFC compliant (#19448)

fixes #19442
---
 cmd/object-handlers-common.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cmd/object-handlers-common.go b/cmd/object-handlers-common.go
index e84fd26ca..3feff7b68 100644
--- a/cmd/object-handlers-common.go
+++ b/cmd/object-handlers-common.go
@@ -185,7 +185,7 @@ func checkPreconditionsPUT(ctx context.Context, w http.ResponseWriter, r *http.R
 		if isETagEqual(objInfo.ETag, ifNoneMatchETagHeader) {
 			// If the object ETag matches with the specified ETag.
 			writeHeaders()
-			w.WriteHeader(http.StatusNotModified)
+			writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrPreconditionFailed), r.URL)
 			return true
 		}
 	}