diff --git a/config/train_ar30.yaml b/config/train_ar30.yaml
index a1eaa44..a5c406e 100644
--- a/config/train_ar30.yaml
+++ b/config/train_ar30.yaml
@@ -49,6 +49,7 @@ harness:
   batch_correct_ratio: 0.5
   momentum_samples: 20
   eval_min_per_class: 2
+  trainable_min_units: 8
   early_stop_patience: 4
   test_size: 63
   diag_size: 20