diff --git a/keyboards/hhkb/rules.mk b/keyboards/hhkb/rules.mk
index a46271f02..e4190039f 100644
--- a/keyboards/hhkb/rules.mk
+++ b/keyboards/hhkb/rules.mk
@@ -53,7 +53,7 @@ OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT
 #OPT_DEFS += -DBOOTLOADER_SIZE=4096
 
 # as per original hasu settings
-OPT_DEFS += -DBOOTLOADER_SIZE=512
+OPT_DEFS += -DBOOTLOADER_SIZE=4096
 
 # Build Options
 #   comment out to disable the options.