--- /usr/lib/python2.6/site-packages/rubber/converters/latex.py~	2009-06-16 08:12:43.000000000 -0400
+++ /usr/lib/python2.6/site-packages/rubber/converters/latex.py	2011-03-16 10:43:48.000000000 -0400
@@ -76,7 +76,7 @@
 				file, path, descr = imp.find_module(name,
 						rubber.latex_modules.__path__)
 				pymodule = imp.load_module(name, file, path, descr)
-				file.close()
+				if file: file.close()
 				mod = PyModule(self.env, pymodule, dict)
 				msg.log(_("built-in module %s registered") % name)
 			except ImportError: