diff --git a/scripts/ipadapter/plugable_ipadapter.py b/scripts/ipadapter/plugable_ipadapter.py
index 72c0e6652..012bf53fc 100644
--- a/scripts/ipadapter/plugable_ipadapter.py
+++ b/scripts/ipadapter/plugable_ipadapter.py
@@ -193,8 +193,14 @@ def apply_effective_region_mask(self, out: torch.Tensor) -> torch.Tensor:
         assert (
             factor > 0
         ), f"{factor}, {sequence_length}, {self.latent_width}, {self.latent_height}"
-        mask_h = int(self.latent_height * factor)
-        mask_w = int(self.latent_width * factor)
+        mask_h = round(self.latent_height * factor)
+        mask_w = round(self.latent_width * factor)
+
+        # Ensure mask_h * mask_w equals sequence_length
+        if mask_h * mask_w < sequence_length:
+            mask_w += 1
+        elif mask_h * mask_w > sequence_length:
+            mask_w -= 1
 
         mask = torch.nn.functional.interpolate(
             self.effective_region_mask.to(out.device),