diff --git a/include/rtw_efuse.h b/include/rtw_efuse.h
index 1b769a0..37329b5 100644
--- a/include/rtw_efuse.h
+++ b/include/rtw_efuse.h
@@ -48,7 +48,7 @@ enum _EFUSE_DEF_TYPE {
 	TYPE_EFUSE_CONTENT_LEN_BANK			= 6,
 };
 
-#define		EFUSE_MAX_MAP_LEN		256
+#define		EFUSE_MAX_MAP_LEN		512
 #define		EFUSE_MAX_HW_SIZE		512
 #define		EFUSE_MAX_SECTION_BASE	16