diff --git a/vlib/v/gen/c/cgen.v b/vlib/v/gen/c/cgen.v
index fdb4625221..9374e68c8f 100644
--- a/vlib/v/gen/c/cgen.v
+++ b/vlib/v/gen/c/cgen.v
@@ -7604,7 +7604,7 @@ fn (mut g Gen) type_default_impl(typ_ ast.Type, decode_sumtype bool) string {
 					field_sym := g.table.sym(field.typ)
 					is_option := field.typ.has_flag(.option)
 					if is_option || field.has_default_expr
-						|| field_sym.kind in [.enum, .array_fixed, .array, .map, .string, .bool, .alias, .i8, .i16, .i32, .int, .i64, .u8, .u16, .u32, .u64, .f32, .f64, .char, .voidptr, .byteptr, .charptr, .struct, .chan, .sum_type] {
+						|| field_sym.kind in [.enum, .array_fixed, .array, .map, .string, .bool, .alias, .i8, .i16, .int, .i64, .u8, .u16, .u32, .u64, .f32, .f64, .char, .voidptr, .byteptr, .charptr, .struct, .chan, .sum_type] {
 						if sym.language == .c && !field.has_default_expr && !is_option {
 							continue
 						}