diff --git a/.gitattributes b/.gitattributes
index 491835e2029f60c6dfdf4a3b760e5ce481e23389..3f4b996d3e5e42f8df2242e50c4f867c97d9a77e 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -4,6 +4,13 @@
 
 Changelog merge=union
 
+###############
+# BINARY: set #
+###############
+# built-in macro that also unsets the "text" and "diff" attributes
+
+*.pdf binary
+
 #########################
 # HEADER_SPEC: CEA_LGPL #
 #########################