diff --git a/Core/ST7735/UI/bmfont.c b/Core/ST7735/UI/bmfont.c
index f20c3fe..8f996ce 100644
--- a/Core/ST7735/UI/bmfont.c
+++ b/Core/ST7735/UI/bmfont.c
@@ -123,7 +123,7 @@ uint16_t bmf_get_text_width(bmf_BitmapFont *font, uint8_t *text, uint32_t bytes_
         }
         // get char width
         if (unicode == bmf_ASCII_SPACE) {
-            u8_char_size = u8_char_size / 2; // half width space
+            u8_char_size = font->char_width / 2; // half width space
         } else if (unicode == bmf_ASCII_T) {
             u8_char_size = font->char_width * bmf_TAB_SIZE;
         } else if (unicode == bmf_ASCII_R || unicode == bmf_ASCII_N) {