diff --git a/extensions-builtin/sd_forge_controlnet/scripts/controlnet.py b/extensions-builtin/sd_forge_controlnet/scripts/controlnet.py
index af8b8d0e..ecb06e8e 100644
--- a/extensions-builtin/sd_forge_controlnet/scripts/controlnet.py
+++ b/extensions-builtin/sd_forge_controlnet/scripts/controlnet.py
@@ -338,6 +338,7 @@ class ControlNetForForgeOfficial(scripts.Script):
 
         preprocessor_output = preprocessor(
             input_image=input_image,
+            input_mask=input_mask,
             resolution=unit.processor_res,
             slider_1=unit.threshold_a,
             slider_2=unit.threshold_b,
diff --git a/modules_forge/supported_preprocessor.py b/modules_forge/supported_preprocessor.py
index 7de23d6a..a6440aa5 100644
--- a/modules_forge/supported_preprocessor.py
+++ b/modules_forge/supported_preprocessor.py
@@ -65,7 +65,7 @@ class Preprocessor:
     def process_after_every_sampling(self, process, params, *args, **kwargs):
         return
 
-    def __call__(self, input_image, resolution, slider_1=None, slider_2=None, slider_3=None, **kwargs):
+    def __call__(self, input_image, resolution, slider_1=None, slider_2=None, slider_3=None, input_mask=None, **kwargs):
         return input_image