diff --git a/users/zeyer/experiments/exp2024_04_23_baselines/model_ext/ctc_sep_net.py b/users/zeyer/experiments/exp2024_04_23_baselines/model_ext/ctc_sep_net.py
index 16989cc8f..0973f4eb4 100644
--- a/users/zeyer/experiments/exp2024_04_23_baselines/model_ext/ctc_sep_net.py
+++ b/users/zeyer/experiments/exp2024_04_23_baselines/model_ext/ctc_sep_net.py
@@ -641,6 +641,20 @@ def ctc_training_with_sep_net(
         use_normalized_loss=use_normalized_loss,
     )
 
+    sep_loss = ctc_loss(
+        logits=sep_log_probs,
+        logits_normalized=True,
+        targets=targets,
+        input_spatial_dim=enc_spatial_dim,
+        targets_spatial_dim=targets_spatial_dim,
+        blank_index=model.blank_idx,
+    )
+    sep_loss.mark_as_loss(
+        "sep_ctc",
+        custom_inv_norm_factor=targets_spatial_dim.get_size_tensor(),
+        use_normalized_loss=use_normalized_loss,
+    )
+
     if model.decoder:
         # potentially also other types but just assume
         # noinspection PyTypeChecker