1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/sensors/pmw3360.c b/drivers/sensors/pmw3360.c
index 17c4675ff..5463bfc59 100644
--- a/drivers/sensors/pmw3360.c
+++ b/drivers/sensors/pmw3360.c
@@ -196,7 +196,7 @@ void pmw_upload_firmware(void) {
     wait_us(15);
 
     unsigned char c;
-    for (int i = 0; i < firmware_length; i++) {
+    for (int i = 0; i < FIRMWARE_LENGTH; i++) {
         c = (unsigned char)pgm_read_byte(firmware_data + i);
         spi_write(c);
         wait_us(15);