diff --git a/doc/.cvsignore b/doc/.cvsignore
index 3e62147..0d34fad 100644
--- a/doc/.cvsignore
+++ b/doc/.cvsignore
@@ -24,3 +24,4 @@ uml-71.gif
 uml-appa.gif
 ver.err
 vis.gif
+*.dot