diff --git a/ecospold2matrix.py b/ecospold2matrix.py
index 3723814..af824dd 100644
--- a/ecospold2matrix.py
+++ b/ecospold2matrix.py
@@ -2400,7 +2400,7 @@ class Ecospold2Matrix(object):
             self.char_method='ReCiPe111'
         else:
             self.log.error("No method defined to read characterisation factors"
-                    " from {}.  Aborting.".format(characterisation_file)
+                    " from {}.  Aborting.".format(characterisation_file))
 
         # sheet reading parameters
         hardcoded = [