diff --git a/wfobj.py b/wfobj.py
index aad92b8..0c6d878 100755
--- a/wfobj.py
+++ b/wfobj.py
@@ -2,7 +2,7 @@
 import types
 
 class WFObj(object):
-    def __init__(source, fileloader=None):
+    def __init__(self, source, fileloader=None):
         self.fileloader = fileloader
         self.vertices = []
         self.texcoords = []
@@ -20,7 +20,7 @@ class WFObj(object):
         else:
             self.load(source)
 
-    def load(fh):
+    def load(self, fh):
         lineno = 0
         current_material_name = ''
 
@@ -105,7 +105,7 @@ class WFObj(object):
             self.specular = (1, 1, 1, 1)
             self.shininess = 50
 
-    def load_material_library(name):
+    def load_material_library(self, name):
         if self.fileloader is not None:
             fh = self.fileloader(name)
         else: