diff --git a/cadquery/freecad_impl/importers.py b/cadquery/freecad_impl/importers.py
index 55d67fe..6104775 100644
--- a/cadquery/freecad_impl/importers.py
+++ b/cadquery/freecad_impl/importers.py
@@ -40,7 +40,7 @@ def importShape(importType,fileName):
 
 	#Check to see what type of file we're working with
 	if importType == ImportTypes.STEP:
-		importStep(fileName)
+		importStep(self,fileName)
 
 #Loads a STEP file into a CQ object
 def importStep(self,fileName):