diff --git a/Mac/AppDelegate.swift b/Mac/AppDelegate.swift
index 3c1dd932c..53a823fcb 100644
--- a/Mac/AppDelegate.swift
+++ b/Mac/AppDelegate.swift
@@ -146,6 +146,9 @@ class AppDelegate: NSObject, NSApplicationDelegate, NSUserInterfaceValidations,
 
 		updateSortMenuItems()
         createAndShowMainWindow()
+		if isFirstRun {
+			mainWindowController?.window?.center()
+		}
 
 		NotificationCenter.default.addObserver(self, selector: #selector(feedSettingDidChange(_:)), name: .FeedSettingDidChange, object: nil)
 		NotificationCenter.default.addObserver(self, selector: #selector(userDefaultsDidChange(_:)), name: UserDefaults.didChangeNotification, object: nil)