diff --git a/examples/stateful_lstm.py b/examples/stateful_lstm.py
index f81d2fb0c0c2..1f47e1100e95 100644
--- a/examples/stateful_lstm.py
+++ b/examples/stateful_lstm.py
@@ -54,7 +54,6 @@ def gen_cosine_amp(amp=100, period=1000, x0=0, xn=50000, step=1, k=0.0001):
                return_sequences=True,
                stateful=True))
 model.add(LSTM(50,
-               batch_input_shape=(batch_size, tsteps, 1),
                return_sequences=False,
                stateful=True))
 model.add(Dense(1))