diff --git a/akka-actor/src/main/scala/akka/util/Crypt.scala b/akka-actor/src/main/scala/akka/util/Crypt.scala
index 164a271432..2507b0e421 100644
--- a/akka-actor/src/main/scala/akka/util/Crypt.scala
+++ b/akka-actor/src/main/scala/akka/util/Crypt.scala
@@ -36,7 +36,7 @@ object Crypt {
 
   def hexify(bytes: Array[Byte]): String = {
     val builder = new StringBuilder
-    bytes.foreach { byte ⇒ builder.append(hex.charAt((byte & 0xF) >> 4)).append(hex.charAt(byte & 0xF)) }
+    bytes.foreach { byte ⇒ builder.append(hex.charAt((byte & 0xF0) >> 4)).append(hex.charAt(byte & 0xF)) }
     builder.toString
   }