diff --git a/cura/Machines/Models/CustomQualityProfilesModel.py b/cura/Machines/Models/CustomQualityProfilesModel.py
index f4325bef71..4c88d83fdc 100644
--- a/cura/Machines/Models/CustomQualityProfilesModel.py
+++ b/cura/Machines/Models/CustomQualityProfilesModel.py
@@ -7,6 +7,9 @@ from UM.Logger import Logger
 from cura.Machines.Models.QualityProfilesModel import QualityProfilesModel
 
 
+#
+# This model is used for the custom profile items in the profile drop down menu.
+#
 class CustomQualityProfilesModel(QualityProfilesModel):
 
     def _update(self):