diff --git a/keras_contrib/backend/tensorflow_backend.py b/keras_contrib/backend/tensorflow_backend.py
index c658132..284cbe4 100644
--- a/keras_contrib/backend/tensorflow_backend.py
+++ b/keras_contrib/backend/tensorflow_backend.py
@@ -6,6 +6,7 @@ try:
 except ImportError:
     import tensorflow.contrib.ctc as ctc
 from keras.backend import tensorflow_backend as KTF
+from keras.backend import dtype
 from keras.backend.common import floatx
 from keras.backend.common import image_data_format
 from keras.backend.tensorflow_backend import _to_tensor