diff --git a/CHANGES b/CHANGES
index 6f90d9e73..28dc3e2ea 100644
--- a/CHANGES
+++ b/CHANGES
@@ -30,6 +30,7 @@ Bugfixes:
  - Qt: Fix controller axis querying
  - GBA Memory: Improve Thumb open bus behavior
  - GBA Memory: Fix 32-bit loads from unaddress cartridge space
+ - Qt: Fix multiplayer windows opening as the wrong size
 Misc:
  - Qt: Show multiplayer numbers in window title
 
diff --git a/src/platform/qt/Window.cpp b/src/platform/qt/Window.cpp
index eae13178e..d5178ec84 100644
--- a/src/platform/qt/Window.cpp
+++ b/src/platform/qt/Window.cpp
@@ -658,9 +658,14 @@ void Window::setupMenu(QMenuBar* menubar) {
 		}
 		Window* w2 = new Window(m_config, multiplayer->attached());
 		w2->setAttribute(Qt::WA_DeleteOnClose);
+#ifndef Q_OS_MAC
+		w2->show();
+#endif
 		w2->loadConfig();
 		w2->controller()->setMultiplayerController(multiplayer);
+#ifdef Q_OS_MAC
 		w2->show();
+#endif
 	});
 	addControlledAction(fileMenu, multiWindow, "multiWindow");