diff --git a/include/sqlpp11/cte.h b/include/sqlpp11/cte.h
index 520d353f..85105317 100644
--- a/include/sqlpp11/cte.h
+++ b/include/sqlpp11/cte.h
@@ -71,13 +71,11 @@ namespace sqlpp
 
 			static Context& _(const T& t, Context& context)
 			{
-				context << '(';
 				serialize(t._lhs, context);
-				context << ") UNION ";
+				context << " UNION ";
 				serialize(Flag{}, context);
-				context << " (";
+				context << " ";
 				serialize(t._rhs, context);
-				context << ')';
 				return context;
 			}
 		};