diff --git a/pelican/generators.py b/pelican/generators.py
index f8be3827..7726726d 100644
--- a/pelican/generators.py
+++ b/pelican/generators.py
@@ -64,11 +64,12 @@ class Generator(object):
             extensions=self.settings['JINJA_EXTENSIONS'],
         )
         try:
-            theme_functions = imp.load_source('theme_functions', self._templates_path[0]+'/functions.py')
+            theme_functions = imp.load_source('theme_functions',
+                    os.path.join(self.theme, '/functions.py'))
         except IOError:
             theme_functions = None
 
-        if theme_functions and '__export__' in vars(theme_functions):
+        if theme_functions and hasattr(theme_functions, '__export__'):
             for func_name in theme_functions.__export__:
                 self.env.globals[func_name] = getattr(theme_functions, func_name)
 
diff --git a/pelican/themes/simple/templates/functions.py b/pelican/themes/simple/functions.py
similarity index 100%
rename from pelican/themes/simple/templates/functions.py
rename to pelican/themes/simple/functions.py