2 files changed, 5 insertions, 3 deletions
diff --git a/drivers/oled/oled_driver.c b/drivers/oled/oled_driver.c
index f20f4629aa..e541228ea9 100644
--- a/drivers/oled/oled_driver.c
+++ b/drivers/oled/oled_driver.c
@@ -392,6 +392,8 @@ void oled_write_char(const char data, bool invert) {
     static uint8_t oled_temp_buffer[OLED_FONT_WIDTH];
     memcpy(&oled_temp_buffer, oled_cursor, OLED_FONT_WIDTH);
 
+    _Static_assert(sizeof(font) >= ((OLED_FONT_END + 1 - OLED_FONT_START) * OLED_FONT_WIDTH), "OLED_FONT_END references outside array");
+
     // set the reder buffer data
     uint8_t cast_data = (uint8_t)data;  // font based on unsigned type for index
     if (cast_data < OLED_FONT_START || cast_data > OLED_FONT_END) {
@@ -585,4 +587,4 @@ void oled_task(void) {
 #endif
 }
 
-__attribute__((weak)) void oled_task_user(void) {}
-\ No newline at end of file
+__attribute__((weak)) void oled_task_user(void) {}
diff --git a/drivers/oled/oled_driver.h b/drivers/oled/oled_driver.h
index 8959609a0f..5aea710dd4 100644
--- a/drivers/oled/oled_driver.h
+++ b/drivers/oled/oled_driver.h
@@ -131,7 +131,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #endif
 // unsigned char value of the last character in the font file
 #if !defined(OLED_FONT_END)
-#    define OLED_FONT_END 224
+#    define OLED_FONT_END 223
 #endif
 // Font render width
 #if !defined(OLED_FONT_WIDTH)
@@ -260,4 +260,4 @@ bool oled_scroll_off(void);
 uint8_t oled_max_chars(void);
 
 // Returns the maximum number of lines that will fit on the oled
-uint8_t oled_max_lines(void);
-\ No newline at end of file
+uint8_t oled_max_lines(void);