diff --git a/src/main/java/net/onrc/onos/core/datastore/hazelcast/HZMultiEntryOperation.java b/src/main/java/net/onrc/onos/core/datastore/hazelcast/HZMultiEntryOperation.java
index 99db3cc..58df13b 100644
--- a/src/main/java/net/onrc/onos/core/datastore/hazelcast/HZMultiEntryOperation.java
+++ b/src/main/java/net/onrc/onos/core/datastore/hazelcast/HZMultiEntryOperation.java
@@ -161,7 +161,7 @@
     @Override
     public String toString() {
         return "[HZMultiEntryOperation table=" + table + ", key="
-                + ByteArrayUtil.toHexStringBuffer(key, ":") + ", operation=" + operation
+                + ByteArrayUtil.toHexStringBuilder(key, ":") + ", operation=" + operation
                 + ", status=" + status + ", writeValue=" + writeValue + "]";
     }
 }