diff --git a/src/lv_font/lv_font_unscii_8.c b/src/lv_font/lv_font_unscii_8.c
index e94da5133..4ba2bf1b0 100644
--- a/src/lv_font/lv_font_unscii_8.c
+++ b/src/lv_font/lv_font_unscii_8.c
@@ -311,7 +311,7 @@ static LV_ATTRIBUTE_LARGE_CONST const uint8_t gylph_bitmap[] = {
  *  GLYPH DESCRIPTION
  *--------------------*/
 
-static lv_font_fmt_txt_glyph_dsc_t glyph_dsc[] = {
+static const lv_font_fmt_txt_glyph_dsc_t glyph_dsc[] = {
     {.bitmap_index = 0, .adv_w = 0, .box_h = 0, .box_w = 0, .ofs_x = 0, .ofs_y = 0} /* id = 0 reserved */,
     {.bitmap_index = 0, .adv_w = 128, .box_h = 0, .box_w = 0, .ofs_x = 0, .ofs_y = 0},
     {.bitmap_index = 0, .adv_w = 128, .box_h = 7, .box_w = 1, .ofs_x = 3, .ofs_y = -1},