diff --git a/src/others/ime/lv_ime_pinyin.h b/src/others/ime/lv_ime_pinyin.h
index f2f2a9940..2d3da778a 100644
--- a/src/others/ime/lv_ime_pinyin.h
+++ b/src/others/ime/lv_ime_pinyin.h
@@ -69,6 +69,8 @@ typedef struct {
  * GLOBAL VARIABLES
  ***********************/
 
+extern const lv_obj_class_t lv_ime_pinyin_class;
+
 /**********************
  * GLOBAL PROTOTYPES
  **********************/