this number just looks wrong, should be 4096 not 4996

keyboards/xd75/rules.mk

@@ -45,7 +45,7 @@ OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT
 #   Atmel DFU loader 4096
 #   LUFA bootloader  4096
 #   USBaspLoader     2048
-OPT_DEFS += -DBOOTLOADER_SIZE=4996
+OPT_DEFS += -DBOOTLOADER_SIZE=4096
 
 # QMK Build Options
 #   change to "no" to disable the options, or define them in the Makefile in