diff --git a/keyboards/kinesis/kint41/rules.mk b/keyboards/kinesis/kint41/rules.mk
index 99c7c0f7d60..e273e8f282e 100644
--- a/keyboards/kinesis/kint41/rules.mk
+++ b/keyboards/kinesis/kint41/rules.mk
@@ -13,3 +13,5 @@ BOOTLOADER = halfkay
 # this because the Cherry MX keyswitches on the Kinesis only produce noise while
 # pressed.
 DEBOUNCE_TYPE = sym_eager_pk
+
+FIRMWARE_FORMAT = hex