diff --git a/.gitattributes b/.gitattributes
index 9af92ddc6..e23bd577d 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -4,3 +4,6 @@
 *.hqx -text
 *.sln -text
 *.vcxproj -text
+*.doc !diff
+*.DOC !diff
+