diff --git a/src/apps/expander/ExpanderPreferences.cpp b/src/apps/expander/ExpanderPreferences.cpp
index 758c2f0c47..bc88bb1546 100644
--- a/src/apps/expander/ExpanderPreferences.cpp
+++ b/src/apps/expander/ExpanderPreferences.cpp
@@ -153,7 +153,7 @@ ExpanderPreferences::ExpanderPreferences(BMessage *settings)
 		new BMessage(MSG_CANCEL));
 	background->AddChild(button);
 	
-	BScreen screen;
+	BScreen screen(this);
 	MoveBy((screen.Frame().Width()-Bounds().Width())/2, 
 		(screen.Frame().Height()-Bounds().Height())/2);
 	
diff --git a/src/apps/expander/ExpanderWindow.cpp b/src/apps/expander/ExpanderWindow.cpp
index c1d26867c4..7a87b1263b 100644
--- a/src/apps/expander/ExpanderWindow.cpp
+++ b/src/apps/expander/ExpanderWindow.cpp
@@ -163,7 +163,7 @@ ExpanderWindow::ExpanderWindow(BRect frame_rect, const entry_ref *ref, BMessage
 	box->AddChild(fListingScroll);
 	fListingScroll->Hide();
 	
-	SetSizeLimits(450, BScreen().Frame().Width(), 120, 120);
+	SetSizeLimits(450, BScreen(this).Frame().Width(), 120, 120);
 	
 	// finish creating window
 	Show();