diff --git a/src/KeyWordExt.cpp b/src/KeyWordExt.cpp
index 95569f6..c99b331 100644
--- a/src/KeyWordExt.cpp
+++ b/src/KeyWordExt.cpp
@@ -1,5 +1,5 @@
 /************************************
- * file enc : utf8
+ * file enc : ASCII
  * author   : wuyanyi09@gmail.com
 ************************************/
 #include "KeyWordExt.h"
diff --git a/src/KeyWordExt.h b/src/KeyWordExt.h
index a6e7e2b..668ebce 100644
--- a/src/KeyWordExt.h
+++ b/src/KeyWordExt.h
@@ -1,5 +1,5 @@
 /************************************
- * file enc : utf8
+ * file enc : ASCII
  * author   : wuyanyi09@gmail.com
 ************************************/
 #ifndef CPPJIEBA_KEYWORDEXT_H
diff --git a/src/Segment.h b/src/Segment.h
index 8efa48f..a5374a2 100644
--- a/src/Segment.h
+++ b/src/Segment.h
@@ -1,5 +1,5 @@
 /************************************
- * file enc : utf8
+ * file enc : ASCII
  * author   : wuyanyi09@gmail.com
 ************************************/
 #ifndef CPPJIEBA_SEGMENT_H
diff --git a/src/TransCode.cpp b/src/TransCode.cpp
index 030c39c..e9be970 100644
--- a/src/TransCode.cpp
+++ b/src/TransCode.cpp
@@ -1,3 +1,7 @@
+/************************************
+ * file enc : ASCII
+ * author   : wuyanyi09@gmail.com
+************************************/
 #include "TransCode.h"
 
 namespace CppJieba
diff --git a/src/TransCode.h b/src/TransCode.h
index 0c58d67..db04eec 100644
--- a/src/TransCode.h
+++ b/src/TransCode.h
@@ -1,3 +1,7 @@
+/************************************
+ * file enc : ASCII
+ * author   : wuyanyi09@gmail.com
+************************************/
 #ifndef CPPJIEBA_TRANSCODE_H
 #define CPPJIEBA_TRANSCODE_H
 
diff --git a/src/Trie.cpp b/src/Trie.cpp
index 463cfd4..6880ea0 100644
--- a/src/Trie.cpp
+++ b/src/Trie.cpp
@@ -1,5 +1,5 @@
 /************************************
- * file enc : utf8
+ * file enc : ASCII
  * author   : wuyanyi09@gmail.com
 ************************************/
 #include "Trie.h"
diff --git a/src/Trie.h b/src/Trie.h
index f4cd9b4..39c5a40 100644
--- a/src/Trie.h
+++ b/src/Trie.h
@@ -1,5 +1,5 @@
 /************************************
- * file enc : utf8
+ * file enc : ASCII
  * author   : wuyanyi09@gmail.com
 ************************************/
 #ifndef CPPJIEBA_TRIE_H
diff --git a/src/globals.h b/src/globals.h
index 013056c..709e67b 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -1,5 +1,5 @@
 /************************************
- * file enc : utf8
+ * file enc : ASCII
  * author   : wuyanyi09@gmail.com
 ************************************/
 #ifndef CPPJIEBA_GLOBALS_H