diff --git a/frappy/config.py b/frappy/config.py
index d8279b5..0ef7d83 100644
--- a/frappy/config.py
+++ b/frappy/config.py
@@ -132,8 +132,7 @@ def process_file(filename, log):
     config_text = filename.read_bytes()
     node = NodeCollector()
     mods = Collector(Mod)
-    ns = {'Node': node.add, 'Mod': mods.add, 'Param': Param,
-          'Prop': Param, 'Command': Param, 'Group': Group}
+    ns = {'Node': node.add, 'Mod': mods.add, 'Param': Param, 'Command': Param, 'Group': Group}
 
     # pylint: disable=exec-used
     exec(compile(config_text, filename, 'exec'), ns)