diff --git a/pkg/storage/utils/ace/ace.go b/pkg/storage/utils/ace/ace.go
index e016f9aa1b3..e115cecebea 100644
--- a/pkg/storage/utils/ace/ace.go
+++ b/pkg/storage/utils/ace/ace.go
@@ -187,10 +187,11 @@ func (e *ACE) Grant() *provider.Grant {
 		},
 		Permissions: e.grantPermissionSet(),
 	}
+	id := e.principal[2:]
 	if e.granteeType() == provider.GranteeType_GRANTEE_TYPE_GROUP {
-		g.Grantee.Id = &provider.Grantee_GroupId{GroupId: &grouppb.GroupId{OpaqueId: e.principal}}
+		g.Grantee.Id = &provider.Grantee_GroupId{GroupId: &grouppb.GroupId{OpaqueId: id}}
 	} else if e.granteeType() == provider.GranteeType_GRANTEE_TYPE_USER {
-		g.Grantee.Id = &provider.Grantee_UserId{UserId: &userpb.UserId{OpaqueId: e.principal}}
+		g.Grantee.Id = &provider.Grantee_UserId{UserId: &userpb.UserId{OpaqueId: id}}
 	}
 	return g
 }