diff --git a/esp8266/modules/flashbdev.py b/esp8266/modules/flashbdev.py
index 40ba655c6..8f8df0b64 100644
--- a/esp8266/modules/flashbdev.py
+++ b/esp8266/modules/flashbdev.py
@@ -3,7 +3,7 @@ import esp
 class FlashBdev:
 
     SEC_SIZE = 4096
-    RESERVED_SECS = 1
+    RESERVED_SECS = 0
     START_SEC = esp.flash_user_start() // SEC_SIZE + RESERVED_SECS
     NUM_BLK = 0x6b - RESERVED_SECS