1 files changed, 2 insertions, 4 deletions
diff --git a/drivers/sensors/adns9800.c b/drivers/sensors/adns9800.c
index 425cf9912f..d167841968 100644
--- a/drivers/sensors/adns9800.c
+++ b/drivers/sensors/adns9800.c
@@ -135,10 +135,8 @@ void adns9800_init() {
     wait_us(15);
 
     // send all bytes of the firmware
-    unsigned char c;
-    for (int i = 0; i < FIRMWARE_LENGTH; i++) {
-        c = (unsigned char)pgm_read_byte(adns9800_firmware_data + i);
-        spi_write(c);
+    for (uint16_t i = 0; i < FIRMWARE_LENGTH; i++) {
+        spi_write(pgm_read_byte(firmware_data + i));
         wait_us(15);
     }