diff --git a/devices.py b/devices.py
index 5fbb65c..e113c20 100644
--- a/devices.py
+++ b/devices.py
@@ -98,7 +98,7 @@ class FrappyConfig(Device):
         for meaning in self.meanings:
             info = getattr(self, meaning)
             aliasnames = info['alias']
-            if isinstance(aliasname, str):
+            if isinstance(aliasnames, str):
                 aliasnames = [aliasnames]
             for aliasname in aliasnames:
                 aliasdev = session.devices.get(aliasname)