diff --git a/nystrom_layer.py b/nystrom_layer.py
index 20a5fc37799e31e10a38d095369ba7d0532dc3ce..4349edc164c247ab91999f6dfbb90953ef995c4a 100644
--- a/nystrom_layer.py
+++ b/nystrom_layer.py
@@ -8,7 +8,7 @@ import keras
 import numpy as np
 from keras.datasets import cifar10
 from keras.models import Sequential, Model
-from keras.layers import Dense, BatchNormalization, Flatten, Lambda, Input, Lambda, concatenate, Activation
+from keras.layers import Dense, BatchNormalization, Flatten, Input, Lambda, concatenate, Activation
 from keras.layers import Conv2D, MaxPooling2D
 from keras.optimizers import Adam
 from keras.preprocessing.image import ImageDataGenerator