diff --git a/modules/shared_options.py b/modules/shared_options.py
index 99a051aaf..fc9f13d6f 100644
--- a/modules/shared_options.py
+++ b/modules/shared_options.py
@@ -101,7 +101,7 @@ options_templates.update(options_section(('upscaling', "Upscaling", "postprocess
     "DAT_tile": OptionInfo(192, "Tile size for DAT upscalers.", gr.Slider, {"minimum": 0, "maximum": 512, "step": 16}).info("0 = no tiling"),
     "DAT_tile_overlap": OptionInfo(8, "Tile overlap for DAT upscalers.", gr.Slider, {"minimum": 0, "maximum": 48, "step": 1}).info("Low values = visible seam"),
     "upscaler_for_img2img": OptionInfo(None, "Upscaler for img2img", gr.Dropdown, lambda: {"choices": [x.name for x in shared.sd_upscalers]}),
-    "scaleBy_from_upscaler": OptionInfo(False, "Automatically set the Scale by factor based on the name of the selected Upscaler.").info("Will not change the value when no matching pattern is found."),
+    "set_scale_by_when_changing_upscaler": OptionInfo(False, "Automatically set the Scale by factor based on the name of the selected Upscaler."),
 }))
 
 options_templates.update(options_section(('face-restoration', "Face restoration", "postprocessing"), {
diff --git a/modules/ui_postprocessing.py b/modules/ui_postprocessing.py
index af44f6195..7261c2df8 100644
--- a/modules/ui_postprocessing.py
+++ b/modules/ui_postprocessing.py
@@ -4,36 +4,6 @@ import modules.infotext_utils as parameters_copypaste
 from modules.ui_components import ResizeHandleRow
 
 
-def hook_scale_update(inputs):
-    import re
-    pattern = r'(\d)[xX]|[xX](\d)'
-
-    resize = upscaler = None
-    for script in inputs:
-        if script.label == "Resize":
-            resize = script
-        elif script.label == "Upscaler 1":
-            upscaler = script
-        elif resize and upscaler:
-            break
-
-    def update_scale(upscaler: str, slider: float):
-        match = re.search(pattern, upscaler)
-
-        if match:
-            if match.group(1):
-                return gr.update(value=int(match.group(1)))
-
-            else:
-                return gr.update(value=int(match.group(2)))
-
-        else:
-            return gr.update(value=slider)
-
-    if resize and upscaler:
-        upscaler.input(update_scale, inputs=[upscaler, resize], outputs=[resize])
-
-
 def create_ui():
     dummy_component = gr.Label(visible=False)
     tab_index = gr.Number(value=0, visible=False)
@@ -53,8 +23,6 @@ def create_ui():
                     show_extras_results = gr.Checkbox(label='Show result images', value=True, elem_id="extras_show_extras_results")
 
             script_inputs = scripts.scripts_postproc.setup_ui()
-            if getattr(shared.opts, 'scaleBy_from_upscaler', False):
-                hook_scale_update(script_inputs)
 
         with gr.Column():
             toprow = ui_toprow.Toprow(is_compact=True, is_img2img=False, id_part="extras")
diff --git a/scripts/postprocessing_upscale.py b/scripts/postprocessing_upscale.py
index e269682d0..d8ba70ed8 100644
--- a/scripts/postprocessing_upscale.py
+++ b/scripts/postprocessing_upscale.py
@@ -1,3 +1,5 @@
+import re
+
 from PIL import Image
 import numpy as np
 
@@ -39,10 +41,22 @@ class ScriptPostprocessingUpscale(scripts_postprocessing.ScriptPostprocessing):
                 extras_upscaler_2 = gr.Dropdown(label='Upscaler 2', elem_id="extras_upscaler_2", choices=[x.name for x in shared.sd_upscalers], value=shared.sd_upscalers[0].name)
                 extras_upscaler_2_visibility = gr.Slider(minimum=0.0, maximum=1.0, step=0.001, label="Upscaler 2 visibility", value=0.0, elem_id="extras_upscaler_2_visibility")
 
+        def on_selected_upscale_method(upscale_method):
+            if not shared.opts.set_scale_by_when_changing_upscaler:
+                return gr.update()
+
+            match = re.search(r'(\d)[xX]|[xX](\d)', upscale_method)
+            if not match:
+                return gr.update()
+
+            return gr.update(value=int(match.group(1) or match.group(2)))
+
         upscaling_res_switch_btn.click(lambda w, h: (h, w), inputs=[upscaling_resize_w, upscaling_resize_h], outputs=[upscaling_resize_w, upscaling_resize_h], show_progress=False)
         tab_scale_by.select(fn=lambda: 0, inputs=[], outputs=[selected_tab])
         tab_scale_to.select(fn=lambda: 1, inputs=[], outputs=[selected_tab])
 
+        extras_upscaler_1.change(on_selected_upscale_method, inputs=[extras_upscaler_1], outputs=[upscaling_resize], show_progress="hidden")
+
         return {
             "upscale_mode": selected_tab,
             "upscale_by": upscaling_resize,