Fix a markup error.
diff --git a/Doc/lib/libpipes.tex b/Doc/lib/libpipes.tex
index 389448b..e91f05b 100644
--- a/Doc/lib/libpipes.tex
+++ b/Doc/lib/libpipes.tex
@@ -19,7 +19,7 @@
 
 \begin{classdesc}{Template}{}
 An abstraction of a pipeline.
-\end{funcdesc}
+\end{classdesc}
 
 Example: