diff --git a/plugins/PostProcessingPlugin/scripts/ColorMix.py b/plugins/PostProcessingPlugin/scripts/ColorMix.py
index 766a81efd8..1dc2796c8b 100644
--- a/plugins/PostProcessingPlugin/scripts/ColorMix.py
+++ b/plugins/PostProcessingPlugin/scripts/ColorMix.py
@@ -44,7 +44,7 @@ class ColorMix(Script):
                     "default_value": 0,
                     "minimum_value": "0"
                 },
-                "c_behavior":
+                "behavior":
                 {
                     "label": "Fixed or blend",
                     "description": "Select Fixed (set new mixture) or Blend mode (dynamic mix)",