diff --git a/docs/streaming-programming-guide.md b/docs/streaming-programming-guide.md
index 2a56cf07d0cfc66abc554f4cc083e93c1747e5c1..f9904d45013f6d2c20ced15437f1f322b6b55728 100644
--- a/docs/streaming-programming-guide.md
+++ b/docs/streaming-programming-guide.md
@@ -539,7 +539,7 @@ common ones are as follows.
   <td> <b>updateStateByKey</b>(<i>func</i>) </td>
   <td> Return a new "state" DStream where the state for each key is updated by applying the
   given function on the previous state of the key and the new values for the key. This can be
-  used to maintain arbitrary state data for each ket.</td>
+  used to maintain arbitrary state data for each key.</td>
 </tr>
 <tr><td></td><td></td></tr>
 </table>