diff --git a/modules/processing.py b/modules/processing.py
index 83c65948..6f6efe06 100644
--- a/modules/processing.py
+++ b/modules/processing.py
@@ -710,7 +710,7 @@ def old_hires_fix_first_pass_dimensions(width, height):
 class StableDiffusionProcessingTxt2Img(StableDiffusionProcessing):
     sampler = None
 
-    def __init__(self, enable_hr: bool = False, denoising_strength: float = 0.75, firstphase_width: int = 0, firstphase_height: int = 0, hr_scale: float = 2.0, hr_upscaler: str = None, hr_second_pass_steps: int = 0, hr_resize_x: int = 0, hr_resize_y: int = 0, hr_sampler: int | str = 0, **kwargs):
+    def __init__(self, enable_hr: bool = False, denoising_strength: float = 0.75, firstphase_width: int = 0, firstphase_height: int = 0, hr_scale: float = 2.0, hr_upscaler: str = None, hr_second_pass_steps: int = 0, hr_resize_x: int = 0, hr_resize_y: int = 0, hr_sampler: str = '---', **kwargs):
         super().__init__(**kwargs)
         self.enable_hr = enable_hr
         self.denoising_strength = denoising_strength
@@ -864,7 +864,7 @@ class StableDiffusionProcessingTxt2Img(StableDiffusionProcessing):
 
         img2img_sampler_name = self.sampler_name if self.sampler_name != 'PLMS' else 'DDIM'  # PLMS does not support img2img so we just silently switch ot DDIM
 
-        if self.hr_sampler == 0:
+        if self.hr_sampler == '---':
             pass
         elif self.hr_sampler == 'PLMS':
             img2img_sampler_name = 'DDIM'
diff --git a/modules/txt2img.py b/modules/txt2img.py
index 8560b74f..9c8ec621 100644
--- a/modules/txt2img.py
+++ b/modules/txt2img.py
@@ -39,7 +39,7 @@ def txt2img(id_task: str, prompt: str, negative_prompt: str, prompt_styles, step
         hr_resize_x=hr_resize_x,
         hr_resize_y=hr_resize_y,
         hr_sampler=sd_samplers.samplers[hr_sampler_index - 1].name
-        if hr_sampler_index != 0 else 0
+        if hr_sampler_index != 0 else '---'
     )
 
     p.scripts = modules.scripts.scripts_txt2img