diff --git a/.gitignore b/.gitignore
index 593d810a368b8c1226291b2934206fc5edf33923..64f23822bf30e9700f24c185f626343d379dd239 100644
--- a/.gitignore
+++ b/.gitignore
@@ -13,6 +13,7 @@
 /doc/source/images/*.pdf
 /doc/source/images/.*_flag
 /doc/source/images/[a-zA-Z]*.py
+/doc/source/images/*.txt
 /build.conf
 /kwant.egg-info/
 /MANIFEST.in