diff --git a/routers/repo/attachment.go b/routers/repo/attachment.go
index 302f5b33f..fdf7dbcb9 100644
--- a/routers/repo/attachment.go
+++ b/routers/repo/attachment.go
@@ -48,7 +48,7 @@ func UploadAttachment(ctx *context.Context) {
 	allowed := false
 	for _, t := range allowedTypes {
 		t := strings.Trim(t, " ")
-		if t == "*/*" || t == fileType {
+		if t == "*/*" || strings.HasPrefix(fileType, t) {
 			allowed = true
 			break
 		}