diff --git a/cf/aggregate.py b/cf/aggregate.py
index 2d53d58d69..c5207e5427 100644
--- a/cf/aggregate.py
+++ b/cf/aggregate.py
@@ -511,7 +511,7 @@ def __init__(
                         "cf_role": None,
                         "hasdata": dim_coord.has_data(),
                         "hasbounds": hasbounds,
-                        "coordrefs": self.find_coordrefs(axis),
+                        "coordrefs": self.find_coordrefs(dim_coord_key),
                         "cellsize": cellsize,
                         "spacing": spacing,
                     }