diff --git a/scal3/ui_gtk/customize_dialog.py b/scal3/ui_gtk/customize_dialog.py
index 359223880..a3a5cc049 100644
--- a/scal3/ui_gtk/customize_dialog.py
+++ b/scal3/ui_gtk/customize_dialog.py
@@ -375,6 +375,7 @@ def addPageObj(self, page):
 			)
 			pack(hbox, prefItem.getWidget())
 			pack(page.pageWidget, hbox, 0, 0)
+			item.enablePrefItem = prefItem
 
 		if item.itemListCustomizable and item.items:
 			self._addPageItemsTree(page)
diff --git a/scal3/ui_gtk/right_panel.py b/scal3/ui_gtk/right_panel.py
index b0e7f45ed..9eebea63b 100644
--- a/scal3/ui_gtk/right_panel.py
+++ b/scal3/ui_gtk/right_panel.py
@@ -102,11 +102,18 @@ def __init__(self):
 			styleClass="right-panel-plugins",
 		)
 		# ---
+		self.enablePrefItem = None  # will be set in customize_dialog.py
+		# ---
 		self.addItems()
 		# ---
 		self.show_all()
 		self.onBorderWidthChange()
 
+	def onToggleFromMainWin(self):
+		if self.enablePrefItem is None:
+			return
+		self.enablePrefItem.set(not self.enablePrefItem.get())
+
 	def appendItem(self, item):
 		CustomizableCalObj.appendItem(self, item)
 		swin = gtk.ScrolledWindow()
diff --git a/scal3/ui_gtk/starcal.py b/scal3/ui_gtk/starcal.py
index b73a66346..f7f2383da 100755
--- a/scal3/ui_gtk/starcal.py
+++ b/scal3/ui_gtk/starcal.py
@@ -495,6 +495,10 @@ def _onToggleRightPanel(self):
 		self.rightPanel.enable = enable
 		self.rightPanel.showHide()
 		self.rightPanel.onDateChange()
+
+		# update Enable checkbutton in Customize dialog
+		self.rightPanel.onToggleFromMainWin()
+
 		if ui.mainWinRightPanelResizeOnToggle:
 			ww, wh = self.get_size()
 			mw = ui.mainWinRightPanelWidth