diff --git a/net.py b/net.py
index 630ad59..b971286 100644
--- a/net.py
+++ b/net.py
@@ -76,7 +76,7 @@ def addExtraLayers():
                     elif layerAct == 'maxout':
                         newLayers.append({
                             'type': 'maxout',
-                            'group_size': layer['group_size'] if group_size in layerKeys else 2
+                            'group_size': layer['group_size'] if 'group_size' in layerKeys else 2
                         })
                     else:
                         print 'Error: Unsupported activation'
@@ -191,4 +191,4 @@ def fromJSON(self, json):
             elif layerType == 'mex':        obj = MexLayer(layer)
 
             obj.fromJSON(layer)
-            self.layers.append(obj)
\ No newline at end of file
+            self.layers.append(obj)