diff --git a/casanovo/denovo/model_runner.py b/casanovo/denovo/model_runner.py
index a7302565..adc4c8cc 100644
--- a/casanovo/denovo/model_runner.py
+++ b/casanovo/denovo/model_runner.py
@@ -46,6 +46,9 @@ class ModelRunner:
     output_rootname : str | None, optional
         The root name for checkpoint files (e.g., checkpoints or results). If
         `None` no base name will be used for checkpoint files.
+    overwrite_ckpt_check: bool, optional
+        Whether to check output_dir (if not `None`) for conflicting checkpoint
+        files.
     """
 
     def __init__(