diff --git a/src/Mod/Material/MaterialEditor.py b/src/Mod/Material/MaterialEditor.py
index 1b79561f75..e609bda3b2 100644
--- a/src/Mod/Material/MaterialEditor.py
+++ b/src/Mod/Material/MaterialEditor.py
@@ -63,6 +63,9 @@ class MaterialEditor:
 
         # load the UI file from the same directory as this script
         self.widget = FreeCADGui.PySideUic.loadUi(filePath + "materials-editor.ui")
+        # remove unused Help button
+        self.widget.setWindowFlags(self.widget.windowFlags()
+                                   & ~QtCore.Qt.WindowContextHelpButtonHint)
 
         # restore size and position
         param = FreeCAD.ParamGet("User parameter:BaseApp/Preferences/Mod/Material")