diff --git a/evennia/prototypes/prototypes.py b/evennia/prototypes/prototypes.py
index eac53a6504..fc8edb55ab 100644
--- a/evennia/prototypes/prototypes.py
+++ b/evennia/prototypes/prototypes.py
@@ -107,9 +107,10 @@ for mod in settings.PROTOTYPE_MODULES:
     # internally we store as (key, desc, locks, tags, prototype_dict)
     prots = []
     for variable_name, prot in all_from_module(mod).items():
-        if "prototype_key" not in prot:
-            prot['prototype_key'] = variable_name.lower()
-        prots.append((prot['prototype_key'], homogenize_prototype(prot)))
+        if isinstance(prot, dict):
+            if "prototype_key" not in prot:
+                prot['prototype_key'] = variable_name.lower()
+            prots.append((prot['prototype_key'], homogenize_prototype(prot)))
     # assign module path to each prototype_key for easy reference
     _MODULE_PROTOTYPE_MODULES.update({prototype_key.lower(): mod for prototype_key, _ in prots})
     # make sure the prototype contains all meta info