diff --git a/lib/jumper.ex b/lib/jumper.ex
index 236aa5a..78da6d5 100644
--- a/lib/jumper.ex
+++ b/lib/jumper.ex
@@ -28,7 +28,7 @@ defmodule Jumper do
   @jump 1 <<< 31
 
   # magic number use for jumping
-  @mage 0x27BB2EE687B0B000
+  @mage 0x27BB2EE687B0B0FD
 
   # a 64 bit mask for wrapping
   @mask 0xFFFFFFFFFFFFFFFF
diff --git a/test/jumper_test.exs b/test/jumper_test.exs
index 6cabece..fbd7d7f 100644
--- a/test/jumper_test.exs
+++ b/test/jumper_test.exs
@@ -23,7 +23,7 @@ defmodule JumperTest do
   end
 
   test "slot(0xA9993E364706816ABA3E25717850C26C9CD0D89D, 5)" do
-    assert Jumper.slot(0xA9993E364706816ABA3E25717850C26C9CD0D89D, 5) == 5
+    assert Jumper.slot(0xA9993E364706816ABA3E25717850C26C9CD0D89D, 5) == 2
   end
 
   test "negative buckets" do