diff --git a/src/backend/langflow/api/v1/base.py b/src/backend/langflow/api/v1/base.py
index b1071bea2..f2c2f3f59 100644
--- a/src/backend/langflow/api/v1/base.py
+++ b/src/backend/langflow/api/v1/base.py
@@ -22,7 +22,7 @@ class ValidatePromptRequest(BaseModel):
     name: str
     template: str
     # optional for tweak call
-    frontend_node: Optional[FrontendNodeRequest]
+    frontend_node: Optional[FrontendNodeRequest] = None
 
 
 # Build ValidationResponse class for {"imports": {"errors": []}, "function": {"errors": []}}
diff --git a/src/backend/langflow/api/v1/validate.py b/src/backend/langflow/api/v1/validate.py
index da76d25bc..64ef60549 100644
--- a/src/backend/langflow/api/v1/validate.py
+++ b/src/backend/langflow/api/v1/validate.py
@@ -35,7 +35,7 @@ def post_validate_prompt(prompt_request: ValidatePromptRequest):
         if prompt_request.frontend_node is None:
             return PromptValidationResponse(
                 input_variables=input_variables,
-                frontend_node={},
+                frontend_node=None,
             )
         old_custom_fields = get_old_custom_fields(prompt_request)