diff --git a/plugins/PostProcessingPlugin/scripts/ColorMix.py b/plugins/PostProcessingPlugin/scripts/ColorMix.py
index af64ea2764..a923918caa 100644
--- a/plugins/PostProcessingPlugin/scripts/ColorMix.py
+++ b/plugins/PostProcessingPlugin/scripts/ColorMix.py
@@ -28,7 +28,7 @@ class ColorMix(Script):
             "version": 2,
             "settings":
             {
-                "a_unitsOfMeasurement":
+                "measurement_units":
                 {
                     "label": "Units of measurement",
                     "description": "Input value as mm or layer number.",
@@ -187,4 +187,4 @@ class ColorMix(Script):
                 lineIndex += 1  #for deleting index
             data[index] = modified_gcode
             index += 1
-        return data
\ No newline at end of file
+        return data