diff --git a/modules/context/repo.go b/modules/context/repo.go
index 76fe1c5676a51..355c40af8a693 100644
--- a/modules/context/repo.go
+++ b/modules/context/repo.go
@@ -914,7 +914,7 @@ func RepoRefByType(refType RepoRefType, ignoreNotExistErr ...bool) func(*Context
 
 			if refType == RepoRefLegacy {
 				// redirect from old URL scheme to new URL scheme
-				prefix := strings.TrimPrefix(setting.AppSubURL+strings.TrimSuffix(ctx.Req.URL.Path, ctx.Params("*")), ctx.Repo.RepoLink)
+				prefix := strings.TrimPrefix(setting.AppSubURL+strings.ToLower(strings.TrimSuffix(ctx.Req.URL.Path, ctx.Params("*"))), strings.ToLower(ctx.Repo.RepoLink))
 
 				ctx.Redirect(path.Join(
 					ctx.Repo.RepoLink,