diff --git a/code/chap03ex.ipynb b/code/chap03ex.ipynb
index 04942f350..0144648f5 100644
--- a/code/chap03ex.ipynb
+++ b/code/chap03ex.ipynb
@@ -81,7 +81,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "To normalize the disrtibution, we could divide through by the total count:"
+    "To normalize the distribution, we could divide through by the total count:"
    ]
   },
   {