diff --git a/Makefile b/Makefile
index df0bd6d..8629ddb 100644
--- a/Makefile
+++ b/Makefile
@@ -29,8 +29,8 @@ ESPBAUD		?= 460800
 
 # --------------- chipset configuration   ---------------
 
-# Pick your flash size: "512KB" or "4MB"
-FLASH_SIZE ?= 4MB
+# Pick your flash size: "512KB", "1MB", or "4MB"
+FLASH_SIZE ?= 512KB
 
 ifeq ("$(FLASH_SIZE)","512KB")
 # Winbond 25Q40 512KB flash, typ for esp-01 thru esp-11