diff --git a/fs.go b/fs.go
index a3d0c6ea6e..7738ca2a05 100644
--- a/fs.go
+++ b/fs.go
@@ -1229,7 +1229,11 @@ func ParseByteRange(byteRange []byte, contentLength int) (startPos, endPos int,
 
 func (h *fsHandler) openIndexFile(ctx *RequestCtx, dirPath string, mustCompress bool, fileEncoding string) (*fsFile, error) {
 	for _, indexName := range h.indexNames {
-		indexFilePath := dirPath + "/" + indexName
+		indexFilePath := indexName
+		if dirPath != "" {
+			indexFilePath = dirPath + "/" + indexName
+		}
+
 		ff, err := h.openFSFile(indexFilePath, mustCompress, fileEncoding)
 		if err == nil {
 			return ff, nil