diff --git a/src/main/java/net/onrc/onos/core/datastore/ObjectDoesntExistException.java b/src/main/java/net/onrc/onos/core/datastore/ObjectDoesntExistException.java
index 354cd9c..9228f61 100644
--- a/src/main/java/net/onrc/onos/core/datastore/ObjectDoesntExistException.java
+++ b/src/main/java/net/onrc/onos/core/datastore/ObjectDoesntExistException.java
@@ -14,12 +14,12 @@
 
     public ObjectDoesntExistException(final IKVTableID tableID,
                                       final byte[] key, final Throwable cause) {
-        super(ByteArrayUtil.toHexStringBuffer(key, ":")
+        super(ByteArrayUtil.toHexStringBuilder(key, ":")
                 + " did not exist on table:" + tableID, cause);
     }
 
     public ObjectDoesntExistException(final IKVTableID tableID, final byte[] key) {
-        super(ByteArrayUtil.toHexStringBuffer(key, ":")
+        super(ByteArrayUtil.toHexStringBuilder(key, ":")
                 + " did not exist on table:" + tableID);
     }
 }