diff --git a/CHANGES.rst b/CHANGES.rst
index 1c1e35608b..e3a61e2b54 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -4,6 +4,7 @@ Changelog
 2.5.0 (unreleased)
 ------------------
 
+- #2422 Fix Maximum number of Iterations Exceeded when no catalogs set for AT type
 - #2421 Fix hanging sampletype listing view in setup
 - #2420 Fix page reload in multi results classic view
 - #2419 Check permission when automatic sample reception is enabled
diff --git a/src/bika/lims/api/__init__.py b/src/bika/lims/api/__init__.py
index 1f03d276c9..6e9fe1aa3f 100644
--- a/src/bika/lims/api/__init__.py
+++ b/src/bika/lims/api/__init__.py
@@ -1135,7 +1135,7 @@ def get_catalogs_for(brain_or_object, default=PORTAL_CATALOG):
             # AT content type
             # => Looup via archetype_tool
             archetype_tool = get_tool("archetype_tool")
-            catalogs = archetype_tool.catalog_map.get(portal_type)
+            catalogs = archetype_tool.catalog_map.get(portal_type) or []
         else:
             # DX content type
             # => resolve the `_catalogs` attribute from the class