diff --git a/extensions-builtin/forge_legacy_preprocessors/scripts/legacy_preprocessors.py b/extensions-builtin/forge_legacy_preprocessors/scripts/legacy_preprocessors.py
index 19004d58..9b65644e 100644
--- a/extensions-builtin/forge_legacy_preprocessors/scripts/legacy_preprocessors.py
+++ b/extensions-builtin/forge_legacy_preprocessors/scripts/legacy_preprocessors.py
@@ -30,6 +30,7 @@ class LegacyPreprocessor(Preprocessor):
             self.resolution = PreprocessorParameter(visible=False)
         else:
             legacy_dict['resolution']['label'] = 'Resolution'
+            legacy_dict['resolution']['step'] = 8
             self.resolution = PreprocessorParameter(**legacy_dict['resolution'], visible=True)
 
         if legacy_dict['slider_1'] is None: