diff --git a/keyboards/miuni32/rules.mk b/keyboards/miuni32/rules.mk
index 55898147..ef8daf3c 100644
--- a/keyboards/miuni32/rules.mk
+++ b/keyboards/miuni32/rules.mk
@@ -45,7 +45,7 @@ OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT
 #   Atmel DFU loader 4096
 #   LUFA bootloader  4096
 #   USBaspLoader     2048
-OPT_DEFS += -DBOOTLOADER_SIZE=512
+OPT_DEFS += -DBOOTLOADER_SIZE=4096
 
 
 # Build Options