diff --git a/qkeras/qconvolutional.py b/qkeras/qconvolutional.py
index 8e4c9f40..0902311c 100644
--- a/qkeras/qconvolutional.py
+++ b/qkeras/qconvolutional.py
@@ -474,10 +474,11 @@ def call(self, inputs, training=None):
 
   def get_config(self):
     config = super(QDepthwiseConv2D, self).get_config()
-    config.pop("filters", None)
-    config.pop("kernel_initializer", None)
-    config.pop("kernel_regularizer", None)
-    config.pop("kernel_constraint", None)
+    for x,y in (("filters", None),
+                ("kernel_initializer", None),
+                ("kernel_regularizer", None),
+                ("kernel_constraint", None)):
+      config.pop(x,y)
     config["depth_multiplier"] = self.depth_multiplier
     config["depthwise_initializer"] = initializers.serialize(
         self.depthwise_initializer)