diff --git a/driver/src/main/scala/com/datastax/spark/connector/types/TypeConverter.scala b/driver/src/main/scala/com/datastax/spark/connector/types/TypeConverter.scala
index 07856f764..901e67cb0 100644
--- a/driver/src/main/scala/com/datastax/spark/connector/types/TypeConverter.scala
+++ b/driver/src/main/scala/com/datastax/spark/connector/types/TypeConverter.scala
@@ -270,7 +270,18 @@ object TypeConverter {
     }
   }
 
-  private def byteArrayToString (x: Array[Byte])  = "0x" + x.map("%02x" format _).mkString
+  private val HEX_CHARS = Array(
+    '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'
+  )
+  private def byteArrayToString (x: Array[Byte]) : String = {
+    val result = new StringBuilder(x.length * 2) 
+    x.foreach { b =>
+      val v = b & 0xFF
+      result.append(HEX_CHARS(v >>> 4))
+      result.append(HEX_CHARS(v & 0x0F))
+    }
+    "0x" + result.toString()
+  }
   private def stringToByteArray (x: String)  = new BigInteger(x.substring(2), 16).toByteArray
 
   private val ByteBufferTypeTag = implicitly[TypeTag[ByteBuffer]]
diff --git a/driver/src/test/scala/com/datastax/spark/connector/types/TypeConverterTest.scala b/driver/src/test/scala/com/datastax/spark/connector/types/TypeConverterTest.scala
index e34e96c97..2825935bc 100644
--- a/driver/src/test/scala/com/datastax/spark/connector/types/TypeConverterTest.scala
+++ b/driver/src/test/scala/com/datastax/spark/connector/types/TypeConverterTest.scala
@@ -153,6 +153,13 @@ class TypeConverterTest {
     assertEquals("a string", c.convert("a string"))
   }
 
+  @Test
+  def testByteArrayToString() {
+    val c = TypeConverter.forType[String]
+    val byteArray : Array[Byte] = Array(1,3,-56,45,23,67)
+    assertEquals("0x0103c82d1743", c.convert(byteArray))
+  }
+
   @Test
   def testDate() {
     val c = TypeConverter.forType[Date]