diff --git a/sgm/inference/api.py b/sgm/inference/api.py
index be4b245..ec17dfe 100644
--- a/sgm/inference/api.py
+++ b/sgm/inference/api.py
@@ -223,11 +223,10 @@ class SamplingPipeline:
     ):
         sampler = get_sampler_config(params)
 
-        if params.img2img_strength < 1.0:
-            sampler.discretization = Img2ImgDiscretizationWrapper(
-                sampler.discretization,
-                strength=params.img2img_strength,
-            )
+        sampler.discretization = self.wrap_discretization(
+            sampler.discretization, strength=params.img2img_strength
+        )
+
         height, width = image.shape[2], image.shape[3]
         value_dict = asdict(params)
         value_dict["prompt"] = prompt
@@ -245,6 +244,14 @@ class SamplingPipeline:
             filter=None,
         )
 
+    def wrap_discretization(self, discretization, strength=1.0):
+        if (
+            not isinstance(discretization, Img2ImgDiscretizationWrapper)
+            and strength < 1.0
+        ):
+            return Img2ImgDiscretizationWrapper(discretization, strength=strength)
+        return discretization
+
     def refiner(
         self,
         image,
@@ -270,11 +277,9 @@ class SamplingPipeline:
             "negative_aesthetic_score": 2.5,
         }
 
-        if params.img2img_strength < 1.0:
-            sampler.discretization = Img2ImgDiscretizationWrapper(
-                sampler.discretization,
-                strength=params.img2img_strength,
-            )
+        sampler.discretization = self.wrap_discretization(
+            sampler.discretization, strength=params.img2img_strength
+        )
 
         return do_img2img(
             image,