diff --git a/doc/.gitignore b/doc/.gitignore
index 1d549ade60c4d886124e7d79ab6ef6b0fdb9235c..52106f80557d6bdfb5867be19a33fb7ec6f85805 100644
--- a/doc/.gitignore
+++ b/doc/.gitignore
@@ -13,3 +13,4 @@
 *.tp
 *.txt
 *.vr
+*.out