diff --git a/doc/.gitignore b/doc/.gitignore
index 2cb6f5896..801e06728 100644
--- a/doc/.gitignore
+++ b/doc/.gitignore
@@ -10,6 +10,7 @@ Guidebook.dat
 Guidebook.aux
 Guidebook.dvi
 Guidebook.log
+Guidebook.out
 Guidebook.pdf
 Guidebook.ps
 Guidebook.dated.*