diff --git a/pykat/finesse.py b/pykat/finesse.py
index 100b98d2fd4cae3ddcdeb24b7d86a58f631c3f91..a33f8dba59b8310a97764f4f808f0d86d9391944 100644
--- a/pykat/finesse.py
+++ b/pykat/finesse.py
@@ -942,7 +942,7 @@ class kat(object):
     
     def parseKatCode(self, code, blocks=None):
         warnings.warn('parseKatCode depreciated, use parseCommands.', stacklevel=2)
-        self.parseCommands(code, block=blocks)
+        self.parseCommands(code, blocks=blocks)
 
     def processConstants(self, commands):
         """