diff --git a/include/configs/sbc8641d.h b/include/configs/sbc8641d.h
index d248eff42005465e84d04f228def0376b68c1373..9fe90f00ff2a794d9eda1e426a3332310072e48a 100644
--- a/include/configs/sbc8641d.h
+++ b/include/configs/sbc8641d.h
@@ -473,7 +473,7 @@
  */
 #define CONFIG_ENV_IS_IN_FLASH	1
 #define CONFIG_ENV_ADDR		(CONFIG_SYS_MONITOR_BASE + 0x40000)
-#define CONFIG_ENV_SECT_SIZE	0x40000	/* 256K(one sector) for env */
+#define CONFIG_ENV_SECT_SIZE	0x20000	/* 128k(one sector) for env */
 #define CONFIG_ENV_SIZE		0x2000
 
 #define CONFIG_LOADS_ECHO	1	/* echo on for serial download */