diff --git a/vlib/v/checker/check_types.v b/vlib/v/checker/check_types.v
index 53398523d4..97aca546fe 100644
--- a/vlib/v/checker/check_types.v
+++ b/vlib/v/checker/check_types.v
@@ -363,6 +363,10 @@ pub fn (mut c Checker) check_basic(got ast.Type, expected ast.Type) bool {
 }
 
 pub fn (mut c Checker) check_matching_function_symbols(got_type_sym &ast.TypeSymbol, exp_type_sym &ast.TypeSymbol) bool {
+	if c.pref.translated {
+		// TODO too open
+		return true
+	}
 	got_info := got_type_sym.info as ast.FnType
 	exp_info := exp_type_sym.info as ast.FnType
 	got_fn := got_info.func
diff --git a/vlib/v/pref/pref.v b/vlib/v/pref/pref.v
index 4a2e52beb9..0d6a0c7e0f 100644
--- a/vlib/v/pref/pref.v
+++ b/vlib/v/pref/pref.v
@@ -654,6 +654,9 @@ pub fn parse_args_and_show_errors(known_external_commands []string, args []strin
 				}
 				i++
 			}
+			'-is_o' {
+				res.is_o = true
+			}
 			'-b', '-backend' {
 				sbackend := cmdline.option(current_args, arg, 'c')
 				res.build_options << '$arg $sbackend'