diff --git a/py/api/admin.py b/py/api/admin.py
index 64768544..0d4df16d 100644
--- a/py/api/admin.py
+++ b/py/api/admin.py
@@ -176,7 +176,7 @@ def _physical_file_key(path, stat):
     volumes on Windows) falls back to the resolved, case-folded path.
     """
     if stat.st_ino:
-        return ("inode", stat.st_dev, stat.st_ino)
+        return ("inode", (stat.st_dev, stat.st_ino))
     return ("path", os.path.normcase(os.path.realpath(str(path))))
 
 
diff --git a/py/api/duplicate_spellings.py b/py/api/duplicate_spellings.py
index 7157e994..1e6d2aff 100644
--- a/py/api/duplicate_spellings.py
+++ b/py/api/duplicate_spellings.py
@@ -27,7 +27,7 @@ def _identity(path):
     except OSError:
         return None
     if info.st_ino:
-        return ("inode", info.st_dev, info.st_ino)
+        return ("inode", (info.st_dev, info.st_ino))
     return ("path", os.path.normcase(os.path.realpath(str(path))))