diff --git a/vlib/compiler/table.v b/vlib/compiler/table.v
index 90386ca6ee..4209a0f1ad 100644
--- a/vlib/compiler/table.v
+++ b/vlib/compiler/table.v
@@ -705,7 +705,7 @@ fn (p mut Parser) check_types2(got_, expected_ string, throw bool) bool {
 	if got.starts_with('fn ') && (expected.ends_with('fn') || expected.ends_with('Fn')) {
 		return true
 	}
-	if got.starts_with('fn ') && expected.starts_with('fn ') {
+	if got.starts_with('fn ') && expected.starts_with('fn ') && p.mod == 'gg2' {
 		return true
 	}
 	// Allow pointer arithmetic