diff --git a/src/processing/upscaler.py b/src/processing/upscaler.py
index 2ea4a87..6231f1f 100644
--- a/src/processing/upscaler.py
+++ b/src/processing/upscaler.py
@@ -214,7 +214,10 @@ def upscale_image(
     # Determine output scale
     if scale is None:
         scale = model_info.scale
-    outscale = scale / model_info.netscale if scale != model_info.netscale else None
+
+    # Always pass outscale explicitly to ensure correct output size
+    # The outscale parameter directly controls the final output scale factor
+    outscale = scale
 
     # Process
     if progress_callback: