diff --git a/src/org/redkale/util/DLong.java b/src/org/redkale/util/DLong.java
index 875cdf6c6..8f439ae3f 100644
--- a/src/org/redkale/util/DLong.java
+++ b/src/org/redkale/util/DLong.java
@@ -71,6 +71,7 @@ public final class DLong extends Number implements Comparable<DLong> {
 
     @Override
     public String toString() {
+        if(this == ZERO) return "0";
         return new String(Utility.binToHex(bytes));
     }