diff --git a/easyflash/inc/easyflash.h b/easyflash/inc/easyflash.h
index cc7f374..84ca247 100644
--- a/easyflash/inc/easyflash.h
+++ b/easyflash/inc/easyflash.h
@@ -51,7 +51,7 @@ extern "C" {
     #error "Please configure backup area start address (in ef_cfg.h)"
 #endif
 
-#if !defined(EF_USING_ENV)
+#if !defined(EF_ERASE_MIN_SIZE)
     #error "Please configure minimum size of flash erasure (in ef_cfg.h)"
 #endif
 
@@ -67,7 +67,7 @@ if (!(EXPR))                                                                  \
     while (1);                                                                \
 }
 /* EasyFlash software version number */
-#define EF_SW_VERSION                "1.07.29"
+#define EF_SW_VERSION                "1.08.27"
 
 typedef struct _eflash_env{
     char *key;
diff --git a/easyflash/src/easyflash.c b/easyflash/src/easyflash.c
index c4fdfd5..62ba994 100644
--- a/easyflash/src/easyflash.c
+++ b/easyflash/src/easyflash.c
@@ -31,8 +31,8 @@
  * This all Backup Area Flash storage index. All used flash area configure is under here.
  * |----------------------------|   Storage Size
  * | Environment variables area |   ENV area size @see ENV_AREA_SIZE
- * |      1.system section      |   ENV_SYSTEM_SIZE
- * |      2:data section        |   ENV_AREA_SIZE - ENV_SYSTEM_SIZE
+ * |      1.system section      |   ENV system section size
+ * |      2:data section        |   ENV_AREA_SIZE - ENV system section size
  * |----------------------------|
  * |      Saved log area        |   Log area size @see LOG_AREA_SIZE
  * |----------------------------|
diff --git a/easyflash/src/ef_log.c b/easyflash/src/ef_log.c
index 44f00c8..187df82 100644
--- a/easyflash/src/ef_log.c
+++ b/easyflash/src/ef_log.c
@@ -73,7 +73,7 @@ EfErrCode ef_log_init(void) {
  * Find the log store start address and end address.
  * It's like a ring buffer which implement by flash.
  * The flash log area has two state when find start address and end address.
- *                        state 1                                state 2
+ *                       state 1                                state 2
  *                   |============|                         |============|
  * log area start--> |############| <-- start address       |############| <-- end address
  *                   |############|                         |   empty    |