diff --git a/propainter_inference.py b/propainter_inference.py
index 07dd90d..7041fea 100644
--- a/propainter_inference.py
+++ b/propainter_inference.py
@@ -115,7 +115,7 @@ def complete_flow(
     """
     flow_length = flows_tuple[0].size(dim=1)
     if flow_length > subvideo_length:
-        pred_flows_f, pred_flows_b = [], []
+        pred_flows_f_list, pred_flows_b_list = [], []
         pad_len = 5
         for f in range(0, flow_length, subvideo_length):
             s_f = max(0, f - pad_len)
@@ -132,16 +132,16 @@ def complete_flow(
                 flow_masks[:, s_f : e_f + 1],
             )
 
-            pred_flows_f.append(
+            pred_flows_f_list.append(
                 pred_flows_bi_sub[0][:, pad_len_s : e_f - s_f - pad_len_e]
             )
-            pred_flows_b.append(
+            pred_flows_b_list.append(
                 pred_flows_bi_sub[1][:, pad_len_s : e_f - s_f - pad_len_e]
             )
             torch.cuda.empty_cache()
 
-        pred_flows_f = torch.cat(pred_flows_f, dim=1)
-        pred_flows_b = torch.cat(pred_flows_b, dim=1)
+        pred_flows_f = torch.cat(pred_flows_f_list, dim=1)
+        pred_flows_b = torch.cat(pred_flows_b_list, dim=1)
 
         pred_flows_bi = (pred_flows_f, pred_flows_b)
 
@@ -175,7 +175,7 @@ def image_propagation(
         100, config.subvideo_length
     )  # ensure a minimum of 100 frames for image propagation
     if config.video_length > subvideo_length_img_prop:
-        updated_frames, updated_masks = [], []
+        updated_frames_list, updated_masks_list = [], []
         pad_len = 10
         for f in range(0, config.video_length, subvideo_length_img_prop):
             s_f = max(0, f - pad_len)
@@ -202,16 +202,16 @@ def image_propagation(
                 b, t, 1, process_height, process_width
             )
 
-            updated_frames.append(
+            updated_frames_list.append(
                 updated_frames_sub[:, pad_len_s : e_f - s_f - pad_len_e]
             )
-            updated_masks.append(
+            updated_masks_list.append(
                 updated_masks_sub[:, pad_len_s : e_f - s_f - pad_len_e]
             )
             torch.cuda.empty_cache()
 
-        updated_frames = torch.cat(updated_frames, dim=1)
-        updated_masks = torch.cat(updated_masks, dim=1)
+        updated_frames = torch.cat(updated_frames_list, dim=1)
+        updated_masks = torch.cat(updated_masks_list, dim=1)
     else:
         b, t, _, _, _ = masks_dilated.size()
         prop_imgs, updated_local_masks = inpaint_model.img_propagation(
diff --git a/propainter_nodes.py b/propainter_nodes.py
index b672650..df923fb 100644
--- a/propainter_nodes.py
+++ b/propainter_nodes.py
@@ -83,7 +83,7 @@ class ProPainterInpaint:
         subvideo_length: int,
         raft_iter: int,
         fp16: str,
-    ) -> tuple[torch.Tensor]:
+    ) -> tuple[torch.Tensor, torch.Tensor, torch.Tensor]:
         """Perform inpainting on images input using the ProPainter model inference."""
         device = model_management.get_torch_device()
 
diff --git a/utils/image_utils.py b/utils/image_utils.py
index acbd63d..e6afb06 100644
--- a/utils/image_utils.py
+++ b/utils/image_utils.py
@@ -128,8 +128,8 @@ def read_masks(
         masks_dilated.append(Image.fromarray(mask_img * 255))
 
     if len(mask_imgs) == 1:
-        flow_masks = flow_masks * config.length
-        masks_dilated = masks_dilated * config.length
+        flow_masks = flow_masks * config.video_length
+        masks_dilated = masks_dilated * config.video_length
 
     return flow_masks, masks_dilated