diff --git a/mayan/apps/converter/classes.py b/mayan/apps/converter/classes.py
index 7a46e173b0..f054d29162 100644
--- a/mayan/apps/converter/classes.py
+++ b/mayan/apps/converter/classes.py
@@ -201,7 +201,7 @@ class ConverterBase(object):
         try:
             self.soffice_file = self.to_pdf()
         except InvalidOfficeFormat:
-            pass
+            logger.debug('Is not an office format document; %s', exception)
 
 
 class BaseTransformation(object):