diff --git a/.gitattributes b/.gitattributes
index b580fea..fcd0795 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -16,8 +16,6 @@ docs/devel/example_singleton.py -text
 docs/devel/example_singleton_pubsub.py -text
 docs/devel/sendmessages.txt -text
 docs/devel/subscribes.txt -text
-docs/user_guide_invesalius3a.odt -text
-docs/user_guide_invesalius3a.pdf -text
 icons/3D_glasses.png -text
 icons/3D_glasses_original.png -text
 icons/Floppy.png -text
diff --git a/docs/user_guide_invesalius3a.odt b/docs/user_guide_invesalius3a.odt
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diff --git a/docs/user_guide_invesalius3a.pdf b/docs/user_guide_invesalius3a.pdf
deleted file mode 100644
index b98fdfc..0000000
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libgit2 0.21.2