diff --git a/cmd/object-handlers-common.go b/cmd/object-handlers-common.go
index e84fd26cab609..3feff7b68c06a 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
 		}
 	}
diff --git a/cmd/s3-zip-handlers.go b/cmd/s3-zip-handlers.go
index 6cb2c892e153c..eabe9450c8521 100644
--- a/cmd/s3-zip-handlers.go
+++ b/cmd/s3-zip-handlers.go
@@ -22,7 +22,9 @@ import (
 	"context"
 	"errors"
 	"io"
+	"mime"
 	"net/http"
+	"path/filepath"
 	"sort"
 	"strings"
 
@@ -166,10 +168,11 @@ func (api objectAPIHandlers) getObjectInArchiveFileHandler(ctx context.Context,
 
 	// New object info
 	fileObjInfo := ObjectInfo{
-		Bucket:  bucket,
-		Name:    object,
-		Size:    int64(file.UncompressedSize64),
-		ModTime: zipObjInfo.ModTime,
+		Bucket:      bucket,
+		Name:        object,
+		Size:        int64(file.UncompressedSize64),
+		ModTime:     zipObjInfo.ModTime,
+		ContentType: mime.TypeByExtension(filepath.Ext(object)),
 	}
 
 	var rc io.ReadCloser