Fix typo.
diff --git a/Doc/lib/libsets.tex b/Doc/lib/libsets.tex
index efa4e0f..6970139 100644
--- a/Doc/lib/libsets.tex
+++ b/Doc/lib/libsets.tex
@@ -9,7 +9,7 @@
 \sectionauthor{Raymond D. Hettinger}{python@rcn.com}
 
 \versionadded{2.3}
-\deprecated{2.6}{ The built-in \code{set}/\code{frozneset} types replace this
+\deprecated{2.6}{The built-in \code{set}/\code{frozenset} types replace this
 module.}
 
 The \module{sets} module provides classes for constructing and manipulating