diff --git a/rllib/examples/replay_buffer_api.py b/rllib/examples/replay_buffer_api.py
index ea9e30b46ebd..4ef20ea7b82f 100644
--- a/rllib/examples/replay_buffer_api.py
+++ b/rllib/examples/replay_buffer_api.py
@@ -53,7 +53,7 @@
         .environment(env="CartPole-v0")
         .training(model=dict(use_lstm=True, lstm_cell_size=64, max_seq_len=20))
         .framework(framework=args.framework)
-        .rollouts(num_workers=4)
+        .rollouts(num_rollout_workers=4)
     )
 
     stop_config = {