diff --git a/.maint/contributors.json b/.maint/contributors.json
index fe51488c..2a7199d5 100644
--- a/.maint/contributors.json
+++ b/.maint/contributors.json
@@ -1 +1,7 @@
-[]
+[
+  {
+    "affiliation": "Montreal Neurological Institute, McGill University",
+    "name": "Huberty, Scott",
+    "orcid": "0000-0003-2637-031X"
+  }
+]
diff --git a/nibabies/workflows/anatomical/base.py b/nibabies/workflows/anatomical/base.py
index 60dfc00d..489c3a81 100644
--- a/nibabies/workflows/anatomical/base.py
+++ b/nibabies/workflows/anatomical/base.py
@@ -612,6 +612,9 @@ def init_infant_single_anat_wf(
             "This workflow uses only T1w or T2w inputs, but both contrasts are available."
         )
 
+    if not (t1w or t2w):
+        raise RuntimeError("This workflow requires either a T1w or T2w, but none were found.")
+
     anat_files = t1w or t2w
     num_files = len(anat_files)
     workflow = LiterateWorkflow(name=name)