diff --git a/llama_stack/apis/common/type_system.py b/llama_stack/apis/common/type_system.py
index 4808e8238..93a3c0339 100644
--- a/llama_stack/apis/common/type_system.py
+++ b/llama_stack/apis/common/type_system.py
@@ -62,7 +62,6 @@ ParamType = Annotated[
         ObjectType,
         JsonType,
         UnionType,
-        CustomType,
         ChatCompletionInputType,
         CompletionInputType,
         AgentTurnInputType,