diff --git a/src/core/lv_obj_tree.c b/src/core/lv_obj_tree.c
index 1b32c78a2e..79ce5d3f26 100644
--- a/src/core/lv_obj_tree.c
+++ b/src/core/lv_obj_tree.c
@@ -746,7 +746,7 @@ static void dump_tree_core(lv_obj_t * obj, int32_t depth)
 #endif
 
     /*id of `obj0` is an invalid id for builtin id*/
-    LV_LOG_USER("%*sobj:%p, id:%s;", 2 * depth, "", (void *)obj, id);
+    LV_LOG_USER("%*sobj:%p, id:%s;", (int)(2 * depth), "", (void *)obj, id);
 #endif /*LV_USE_LOG*/
 
     if(obj && obj->spec_attr && obj->spec_attr->child_cnt) {