diff --git a/alphafold/model/all_atom.py b/alphafold/model/all_atom.py
index c8ebe8b08..f2d1eca2d 100644
--- a/alphafold/model/all_atom.py
+++ b/alphafold/model/all_atom.py
@@ -694,7 +694,7 @@ def between_residue_bond_loss(
 
   ca_c_n_cos_angle = jnp.sum(c_ca_unit_vec * c_n_unit_vec, axis=-1)
   gt_angle = residue_constants.between_res_cos_angles_ca_c_n[0]
-  gt_stddev = residue_constants.between_res_bond_length_stddev_c_n[0]
+  gt_stddev = residue_constants.between_res_cos_angles_ca_c_n[1]
   ca_c_n_cos_angle_error = jnp.sqrt(
       1e-6 + jnp.square(ca_c_n_cos_angle - gt_angle))
   ca_c_n_loss_per_residue = jax.nn.relu(