diff --git a/src/lv_objx/lv_chart.c b/src/lv_objx/lv_chart.c
index aad2bb8d8..c662ad49f 100644
--- a/src/lv_objx/lv_chart.c
+++ b/src/lv_objx/lv_chart.c
@@ -99,8 +99,8 @@ lv_obj_t * lv_chart_create(lv_obj_t * par, const lv_obj_t * copy)
     memset(&ext->x_axis, 0, sizeof(ext->x_axis));
     memset(&ext->y_axis, 0, sizeof(ext->y_axis));
 
-    if(ancestor_design_f == NULL) ancestor_design_f = lv_obj_get_design_func(new_chart);
-    if(ancestor_signal == NULL) ancestor_signal = lv_obj_get_signal_func(new_chart);
+    if(ancestor_design_f == NULL) ancestor_design_f = lv_obj_get_design_cb(new_chart);
+    if(ancestor_signal == NULL) ancestor_signal = lv_obj_get_signal_cb(new_chart);
 
     lv_obj_set_signal_cb(new_chart, lv_chart_signal);
     lv_obj_set_design_cb(new_chart, lv_chart_design);
@@ -624,9 +624,9 @@ static lv_res_t lv_chart_signal(lv_obj_t * chart, lv_signal_t sign, void * param
             if(buf->type[i] == NULL) break;
         }
         buf->type[i] = "lv_chart";
-    } else if(sign == LV_SIGNAL_REFR_EXT_SIZE) {
+    } else if(sign == LV_SIGNAL_REFR_EXT_DRAW_PAD) {
         /*Provide extra px draw area around the chart*/
-        chart->ext_size = ext->margin;
+        chart->ext_draw_pad = ext->margin;
     }
 
     return res;