diff --git a/vlib/v/ast/table.v b/vlib/v/ast/table.v
index 3b2343336b..0d97d365f3 100644
--- a/vlib/v/ast/table.v
+++ b/vlib/v/ast/table.v
@@ -1211,6 +1211,7 @@ pub fn (mut t Table) resolve_generic_to_concrete(generic_type Type, generic_name
 				func.return_type = typ
 			}
 		}
+		func.params = func.params.clone()
 		for mut param in func.params {
 			if param.typ.has_flag(.generic) {
 				if typ := t.resolve_generic_to_concrete(param.typ, generic_names, concrete_types,
diff --git a/vlib/v/tests/generics_with_anon_generics_fn_test.v b/vlib/v/tests/generics_with_anon_generics_fn_test.v
index 706720bea7..99ee6f8e4e 100644
--- a/vlib/v/tests/generics_with_anon_generics_fn_test.v
+++ b/vlib/v/tests/generics_with_anon_generics_fn_test.v
@@ -24,6 +24,14 @@ pub fn consume(data int) int {
 	return data
 }
 
+pub fn consume_str(data string) string {
+	return data
+}
+
+fn call<T>(f fn (T) T, v T) T {
+	return f(v)
+}
+
 fn test_generics_with_anon_generics_fn() {
 	mut s := MyStruct<int>{
 		arr: [1, 2, 3, 4, 5]
@@ -31,4 +39,9 @@ fn test_generics_with_anon_generics_fn() {
 	y := s.iterate<int>(consume)
 	println(y)
 	assert y == 15
+
+	assert call<int>(consume, 1) == 1
+	assert call<string>(consume_str, '1') == '1'
+	assert call(consume, 1) == 1
+	assert call(consume_str, '1') == '1'
 }