diff --git a/mnist_gan.py b/mnist_gan.py
index 3506a8c..3c2aa05 100644
--- a/mnist_gan.py
+++ b/mnist_gan.py
@@ -100,10 +100,6 @@ def make_trainable(net, val):
 discriminator.summary()
 
 # Freeze weights in the discriminator for stacked training
-def make_trainable(net, val):
-    net.trainable = val
-    for l in net.layers:
-        l.trainable = val
 make_trainable(discriminator, False)
 
 # Build stacked GAN model