diff --git a/docs/tutorials/average_optimizers_callback.ipynb b/docs/tutorials/average_optimizers_callback.ipynb
index adca267659..3f4fc87a81 100644
--- a/docs/tutorials/average_optimizers_callback.ipynb
+++ b/docs/tutorials/average_optimizers_callback.ipynb
@@ -228,7 +228,7 @@
         "id": "nXlMX4p9qHwg"
       },
       "source": [
-        "Both ```MovingAverage``` and ```StocasticAverage``` optimers use ```ModelAverageCheckpoint```."
+        "Both ```MovingAverage``` and ```StochasticAverage``` optimizers use ```ModelAverageCheckpoint```."
       ]
     },
     {