diff --git a/radio/src/thirdparty/libopenui/src/window.h b/radio/src/thirdparty/libopenui/src/window.h
index da8e3f6d5..1a6868aa1 100644
--- a/radio/src/thirdparty/libopenui/src/window.h
+++ b/radio/src/thirdparty/libopenui/src/window.h
@@ -138,7 +138,7 @@ class Window
       auto textColor = COLOR_VAL(flags);
       auto r = GET_RED(textColor), g = GET_GREEN(textColor), b = GET_BLUE(textColor);
       lv_obj_set_style_text_color(lvobj, lv_color_make(r, g, b), LV_PART_MAIN);
-      for (auto i = 0; i < lv_obj_get_child_cnt(lvobj); i++) {
+      for (uint32_t i = 0; i < lv_obj_get_child_cnt(lvobj); i++) {
         auto child = lv_obj_get_child(lvobj, i);
         lv_obj_set_style_text_color(child, lv_color_make(r, g, b), LV_PART_MAIN);
       }