diff --git a/experiment.py b/experiment.py
index 65138d2617390d29611569992b65eb73603ee298..d5716f1e76bb5c23fefc255777e2a1ccc6c84aaf 100755
--- a/experiment.py
+++ b/experiment.py
@@ -41,7 +41,7 @@ def run_config_params():
     seed = 1406182976
     run_params = dict(
             master=None,
-            num_cores=3,
+            num_cores=0,  # If 0, the system picks an appropriate number (default: 0)
             log_device_placement=False,
             gpu_memory_fraction=0.75,
             tf_random_seed=seed,