diff --git a/src/apps/installer/InstallerApp.cpp b/src/apps/installer/InstallerApp.cpp
index 3edec8e9f5..c6a50a45d2 100644
--- a/src/apps/installer/InstallerApp.cpp
+++ b/src/apps/installer/InstallerApp.cpp
@@ -185,10 +185,7 @@ InstallerApp::ReadyToRun()
 		.SetInsets(10, 10, 10, 10)
 	);
 
-	BRect frame = BScreen().Frame();
-	fEULAWindow->MoveTo(frame.left + (frame.Width() - eulaFrame.Width()) / 2,
-		frame.top + (frame.Height() - eulaFrame.Height()) / 2);
-
+	fEULAWindow->CenterOnScreen();
 	fEULAWindow->Show();
 #else
 	// Show the installer window without EULA.
diff --git a/src/apps/installer/InstallerWindow.cpp b/src/apps/installer/InstallerWindow.cpp
index 1867daee3c..7c20e58ae6 100644
--- a/src/apps/installer/InstallerWindow.cpp
+++ b/src/apps/installer/InstallerWindow.cpp
@@ -302,9 +302,7 @@ InstallerWindow::FrameResized(float width, float height)
 		// assume that the first frame event is because of this adoption and
 		// move ourselves to the screen center...
 		fNeedsToCenterOnScreen = false;
-		BRect frame = BScreen(this).Frame();
-		MoveTo(frame.left + (frame.Width() - Frame().Width()) / 2,
-			frame.top + (frame.Height() - Frame().Height()) / 2);
+		CenterOnScreen();
 	}
 }