diff --git a/vlib/v/gen/cgen.v b/vlib/v/gen/cgen.v
index 1cdacabd9f..f6beb25eec 100644
--- a/vlib/v/gen/cgen.v
+++ b/vlib/v/gen/cgen.v
@@ -3310,7 +3310,10 @@ fn (mut g Gen) gen_str_for_array(info table.Array, styp, str_fn_name string) {
 		g.auto_str_funcs.writeln('\t\tstring x = ${field_styp}_str(it);')
 	}
 	g.auto_str_funcs.writeln('\t\tstrings__Builder_write(&sb, x);')
-	g.auto_str_funcs.writeln('\t\tstring_free(x);')
+	if info.elem_type != table.bool_type {
+		// no need to free "true"/"false" literals
+		g.auto_str_funcs.writeln('\t\tstring_free(x);')
+	}
 	g.auto_str_funcs.writeln('\t\tif (i < a.len-1) {')
 	g.auto_str_funcs.writeln('\t\t\tstrings__Builder_write(&sb, tos3(", "));')
 	g.auto_str_funcs.writeln('\t\t}')