diff --git a/fe/fe-core/src/main/java/org/apache/doris/plugin/audit/AuditLoader.java b/fe/fe-core/src/main/java/org/apache/doris/plugin/audit/AuditLoader.java
index 4ae23ae55b658d..b4b8195b60810d 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/plugin/audit/AuditLoader.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/plugin/audit/AuditLoader.java
@@ -46,9 +46,9 @@ public class AuditLoader extends Plugin implements AuditPlugin {
 
     public static final String AUDIT_LOG_TABLE = "audit_log";
 
-    // the "\\u001F" and "\\u001E" are used to separate columns and lines in audit log data
-    public static final String AUDIT_TABLE_COL_SEPARATOR = "\\u001F";
-    public static final String AUDIT_TABLE_LINE_DELIMITER = "\\u001E";
+    // the "0x1F" and "0x1E" are used to separate columns and lines in audit log data
+    public static final char AUDIT_TABLE_COL_SEPARATOR = 0x1F;
+    public static final char AUDIT_TABLE_LINE_DELIMITER = 0x1E;
     // the "\\x1F" and "\\x1E" are used to specified column and line delimiter in stream load request
     // which is corresponding to the "\\u001F" and "\\u001E" in audit log data.
     public static final String AUDIT_TABLE_COL_SEPARATOR_STR = "\\x1F";