diff --git a/contrib/schemagen/weaseljson_schemagen.py b/contrib/schemagen/weaseljson_schemagen.py
index be75e72..8c8b72b 100644
--- a/contrib/schemagen/weaseljson_schemagen.py
+++ b/contrib/schemagen/weaseljson_schemagen.py
@@ -306,7 +306,7 @@ class Builder:
             return result
 
         if typ == "object" or (typ is None and "properties" in node):
-            return self._build_object(node, hint, defname, nullable)
+            return (self._build_object(node, hint, defname, nullable), nullable)
 
         if typ == "array":
             if "items" not in node or not isinstance(node["items"], dict):