diff -Naur lvgl/lv_misc/lv_symbol_def.h lvgl.fix/lv_misc/lv_symbol_def.h
--- lvgl/lv_misc/lv_symbol_def.h	2019-01-31 20:08:33.000000000 -0800
+++ lvgl.fix/lv_misc/lv_symbol_def.h	2019-03-17 17:43:52.780724618 -0700
@@ -73,7 +73,7 @@
 #define SYMBOL_BATTERY_EMPTY   _SYMBOL_VALUE1(F0)
 #define SYMBOL_BLUETOOTH       _SYMBOL_VALUE1(F1)
 #define LV_SYMBOL_GLYPH_LAST   0xF1
-#define SYMBOL_DUMMY           _SYMBOL_VALUE1(xFF)       /*Invalid symbol. If written before a string then `lv_img` will show it as a label*/
+#define SYMBOL_DUMMY           _SYMBOL_VALUE1(FF)       /*Invalid symbol. If written before a string then `lv_img` will show it as a label*/
 
 #else
 #define LV_SYMBOL_GLYPH_FIRST  0xF800