diff --git a/OAT.xml b/OAT.xml
index c69672ce5c475b1923e02dc404921cbeb4be62ae..9788bdf9b6a696a711d7b8e18372eccce71b5dbc 100644
--- a/OAT.xml
+++ b/OAT.xml
@@ -63,7 +63,7 @@
 
         <filefilterlist>
             <filefilter name="defaultFilter" desc="Files not to check">
-                <filteritem type="filename" name="*.iml|*.json|*.txt|*.png" desc="desc files"/>
+                <filteritem type="filename" name="*.iml|*.json|*.txt|*.png|*.pdf" desc="desc files"/>
                 <filteritem type="filename" name="AUTHORS" desc="Author list"/>
                 <filteritem type="filepath" name=".*/docs/.*" desc="Docs files"/>
                 <filteritem type="filepath" name=".*/docs/diagrams/.*" desc="Docs files"/>