diff --git a/keyboards/pabile/p40/rules.mk b/keyboards/pabile/p40/rules.mk
index 5b9ce44e360..f8a15487dec 100644
--- a/keyboards/pabile/p40/rules.mk
+++ b/keyboards/pabile/p40/rules.mk
@@ -1,12 +1,14 @@
 # MCU name
 MCU = atmega32u4
 
-# Boot Section Size in *bytes*
-#   Teensy halfKay   512
-#   Teensy++ halfKay 1024
-#   Atmel DFU loader 4096
-#   LUFA bootloader  4096
-#   USBaspLoader     2048
+# Bootloader selection
+#   Teensy       halfkay
+#   Pro Micro    caterina
+#   Atmel DFU    atmel-dfu
+#   LUFA DFU     lufa-dfu
+#   QMK DFU      qmk-dfu
+#   ATmega32A    bootloadHID
+#   ATmega328P   USBasp
 BOOTLOADER = caterina
 
 # Build Options