diff --git a/CotEditor/Base.lproj/Main.storyboard b/CotEditor/Base.lproj/Main.storyboard
index ad9f1d4f13..ecd0a96283 100644
--- a/CotEditor/Base.lproj/Main.storyboard
+++ b/CotEditor/Base.lproj/Main.storyboard
@@ -572,7 +572,7 @@ Gw
                                                     <menuItem isSeparatorItem="YES" id="XF7-Qo-Y5g"/>
                                                     <menuItem title="Show Inspector" keyEquivalent="i" id="I2p-KB-gxR">
                                                         <connections>
-                                                            <action selector="toggleInspector:" target="Ady-hI-5gd" id="To3-Cv-XPF"/>
+                                                            <action selector="toggleInspector_:" target="Ady-hI-5gd" id="Xmb-c9-cWL"/>
                                                         </connections>
                                                     </menuItem>
                                                 </items>
diff --git a/CotEditor/Sources/DocumentWindowController.swift b/CotEditor/Sources/DocumentWindowController.swift
index facd0c3835..35fb5da8c2 100644
--- a/CotEditor/Sources/DocumentWindowController.swift
+++ b/CotEditor/Sources/DocumentWindowController.swift
@@ -393,7 +393,7 @@ extension DocumentWindowController: NSToolbarDelegate {
                 item.label = String(localized: "Inspector")
                 item.toolTip = String(localized: "Show document information")
                 item.image = NSImage(systemSymbolName: "info.circle", accessibilityDescription: item.label)
-                item.action = #selector(WindowContentViewController.toggleInspector)
+                item.action = #selector(WindowContentViewController.toggleInspector_)
                 item.visibilityPriority = .high
                 return item
                 
diff --git a/CotEditor/Sources/WindowContentViewController.swift b/CotEditor/Sources/WindowContentViewController.swift
index e3787d761d..8c970953c7 100644
--- a/CotEditor/Sources/WindowContentViewController.swift
+++ b/CotEditor/Sources/WindowContentViewController.swift
@@ -79,7 +79,7 @@ final class WindowContentViewController: NSSplitViewController {
     override func validateUserInterfaceItem(_ item: any NSValidatedUserInterfaceItem) -> Bool {
         
         switch item.action {
-            case #selector(toggleInspector):
+            case #selector(toggleInspector_):
                 (item as? NSMenuItem)?.title = self.isInspectorShown
                     ? String(localized: "Hide Inspector")
                     : String(localized: "Show Inspector")
@@ -123,7 +123,7 @@ final class WindowContentViewController: NSSplitViewController {
     // MARK: Action Messages
     
     /// Toggle visibility of the inspector.
-    @IBAction override func toggleInspector(_ sender: Any?) {
+    @IBAction func toggleInspector_(_ sender: Any?) {  // FIXME: Restore action name
         
         NSAnimationContext.current.withAnimation {
             self.isInspectorShown.toggle()