diff --git a/macos/Sources/Features/Terminal/TerminalController.swift b/macos/Sources/Features/Terminal/TerminalController.swift
index f9ab6cfc7..2fabadd77 100644
--- a/macos/Sources/Features/Terminal/TerminalController.swift
+++ b/macos/Sources/Features/Terminal/TerminalController.swift
@@ -140,7 +140,7 @@ class TerminalController: NSWindowController, NSWindowDelegate,
         }
     }
     
-    func fixTabBar() {
+    private func fixTabBar() {
         // We do this to make sure that the tab bar will always re-composite. If we don't,
         // then the it will "drag" pieces of the background with it when a transparent
         // window is moved around.
diff --git a/macos/Sources/Features/Terminal/TerminalWindow.swift b/macos/Sources/Features/Terminal/TerminalWindow.swift
index 8dc42f141..e2d14ad1f 100644
--- a/macos/Sources/Features/Terminal/TerminalWindow.swift
+++ b/macos/Sources/Features/Terminal/TerminalWindow.swift
@@ -29,6 +29,7 @@ class TerminalWindow: NSWindow {
     
     private var windowButtonsBackdrop: NSView? = nil
     private var windowDragHandle: WindowDragView? = nil
+    private var storedTitlebarBackgroundColor: CGColor? = nil
     
     // The tab bar controller ID from macOS
     static private let TabBarController = NSUserInterfaceItemIdentifier("_tabBarController")
@@ -65,8 +66,6 @@ class TerminalWindow: NSWindow {
         }
     }
     
-    private var storedTitlebarBackgroundColor: CGColor? = nil
-    
     // Assign a background color to the titlebar area.
     func setTitlebarBackground(_ color: CGColor) {
         storedTitlebarBackgroundColor = color
@@ -80,9 +79,8 @@ class TerminalWindow: NSWindow {
     }
     
     // Make sure the titlebar has the assigned background color.
-    func restoreTitlebarBackground() {
+    private func restoreTitlebarBackground() {
         guard let color = storedTitlebarBackgroundColor else { return }
-        
         setTitlebarBackground(color)
     }