diff --git a/vlib/v/parser/fn.v b/vlib/v/parser/fn.v
index 4085d91ed5..0d67a1471d 100644
--- a/vlib/v/parser/fn.v
+++ b/vlib/v/parser/fn.v
@@ -43,7 +43,7 @@ pub fn (mut p Parser) call_expr(language ast.Language, mod string) ast.CallExpr
 		// In case of `foo<T>()`
 		// T is unwrapped and registered in the checker.
 		full_generic_fn_name := if fn_name.contains('.') { fn_name } else { p.prepend_mod(fn_name) }
-		has_generic := concrete_types.filter(it.has_flag(.generic)).len > 0
+		has_generic := concrete_types.any(it.has_flag(.generic))
 		if !has_generic {
 			// will be added in checker
 			p.table.register_fn_concrete_types(full_generic_fn_name, concrete_types)