diff --git a/inference/core/workflows/core_steps/visualizations/pixelate/v1.py b/inference/core/workflows/core_steps/visualizations/pixelate/v1.py
index fef296a032..47d0a5d469 100644
--- a/inference/core/workflows/core_steps/visualizations/pixelate/v1.py
+++ b/inference/core/workflows/core_steps/visualizations/pixelate/v1.py
@@ -74,7 +74,7 @@ def getAnnotator(
         self,
         pixel_size: int,
     ) -> sv.annotators.base.BaseAnnotator:
-        key = "_".join(map(str, [pixel_size]))
+        key = str(pixel_size)
 
         if key not in self.annotatorCache:
             self.annotatorCache[key] = sv.PixelateAnnotator(pixel_size=pixel_size)