diff --git a/mybatis-flex-processor/src/main/java/com/mybatisflex/processor/config/ConfigurationKey.java b/mybatis-flex-processor/src/main/java/com/mybatisflex/processor/config/ConfigurationKey.java
index ae76ebd9..40f4488f 100644
--- a/mybatis-flex-processor/src/main/java/com/mybatisflex/processor/config/ConfigurationKey.java
+++ b/mybatis-flex-processor/src/main/java/com/mybatisflex/processor/config/ConfigurationKey.java
@@ -29,6 +29,11 @@ public enum ConfigurationKey {
      */
     ENABLE("processor.enable", ""),
 
+    /**
+     * 生成文件的字符集。
+     */
+    CHARSET("processor.charset", "UTF-8"),
+
     /**
      * APT 代码生成路径。
      */