diff --git a/invokeai/app/invocations/fields.py b/invokeai/app/invocations/fields.py
index 7f2d2783f2..712ab415b0 100644
--- a/invokeai/app/invocations/fields.py
+++ b/invokeai/app/invocations/fields.py
@@ -199,7 +199,7 @@ class DenoiseMaskField(BaseModel):
 
     mask_name: str = Field(description="The name of the mask image")
     masked_latents_name: Optional[str] = Field(default=None, description="The name of the masked image latents")
-    gradient: Optional[bool] = Field(default=False, description="Used for gradient inpainting")
+    gradient: bool = Field(default=False, description="Used for gradient inpainting")
 
 
 class LatentsField(BaseModel):