diff --git a/graphics/macgui/macwindowmanager.cpp b/graphics/macgui/macwindowmanager.cpp
index 3d333839b6b..41de14620fb 100644
--- a/graphics/macgui/macwindowmanager.cpp
+++ b/graphics/macgui/macwindowmanager.cpp
@@ -177,6 +177,8 @@ MacWindowManager::MacWindowManager(uint32 mode, MacPatterns *patterns, Common::L
 	_menuDelay = 0;
 	_menuTimerActive = false;
 
+	_activateScreenCopy = false;
+
 	_engineP = nullptr;
 	_engineR = nullptr;
 	_redrawEngineCallback = nullptr;
@@ -447,14 +449,14 @@ void MacWindowManager::activateMenu() {
 		return;
 
 	if (_mode & kWMModalMenuMode) {
-		activateScreenCopy();
+		_activateScreenCopy = true;
 	}
 
 	_menu->setVisible(true);
 }
 
 void MacWindowManager::activateScreenCopy() {
-	Common::StackLock lock(_mutex);
+	// This is only called when the _mutex is already held
 
 	if (_screen) {
 		if (!_screenCopy)
@@ -897,6 +899,11 @@ void MacWindowManager::drawDesktop() {
 void MacWindowManager::draw() {
 	Common::StackLock lock(_mutex);
 
+	if (_activateScreenCopy) {
+		_activateScreenCopy = false;
+		activateScreenCopy();
+	}
+
 	removeMarked();
 
 	Common::Rect bounds = getScreenBounds();
diff --git a/graphics/macgui/macwindowmanager.h b/graphics/macgui/macwindowmanager.h
index 22a128c77a0..feeb3a7ca98 100644
--- a/graphics/macgui/macwindowmanager.h
+++ b/graphics/macgui/macwindowmanager.h
@@ -457,6 +457,8 @@ private:
 	MacMenu *_menu;
 	uint32 _menuDelay;
 
+	bool _activateScreenCopy;
+
 	Engine *_engineP;
 	void *_engineR;
 	void (*_redrawEngineCallback)(void *engine);