diff --git a/patacrep/encoding.py b/patacrep/encoding.py
index 9f0018da..d38daf60 100644
--- a/patacrep/encoding.py
+++ b/patacrep/encoding.py
@@ -43,4 +43,4 @@ def detect_encoding(filename):
         finally:
             filehandler.close()
 
-    raise Exception('Not suitable encoding found for {}'.format(filename))
+    raise UnicodeDecodeError('Not suitable encoding found for {}'.format(filename))