diff --git a/advanced-iterators.html b/advanced-iterators.html
index e1d10d9..7815f6e 100755
--- a/advanced-iterators.html
+++ b/advanced-iterators.html
@@ -541,7 +541,7 @@ for guess in itertools.permutations(digits, len(characters)):
NameError: name 'x' is not defined
>>> eval("x * 5", {"x": x}, {}) ②
>>> import math
->>> eval("math.sqrt(x)", {"x": x}, {}) ②
+>>> eval("math.sqrt(x)", {"x": x}, {}) ③
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "<string>", line 1, in <module>