diff --git a/Evergreen/MainWindow/MainWindowController.swift b/Evergreen/MainWindow/MainWindowController.swift
index 26dfecda9..fbbbfdcdb 100644
--- a/Evergreen/MainWindow/MainWindowController.swift
+++ b/Evergreen/MainWindow/MainWindowController.swift
@@ -113,7 +113,7 @@ class MainWindowController : NSWindowController, NSUserInterfaceValidations {
 
 	// MARK: Toolbar
 	
-	@objc func makeToolbarValidate(_ sender: Any) {
+	@objc func makeToolbarValidate(_ sender: Any?) {
 		
 		window?.toolbar?.validateVisibleItems()
 	}