diff --git a/src/apps/sudoku/ProgressWindow.cpp b/src/apps/sudoku/ProgressWindow.cpp
index bb2c151621..73c473d8f8 100644
--- a/src/apps/sudoku/ProgressWindow.cpp
+++ b/src/apps/sudoku/ProgressWindow.cpp
@@ -79,8 +79,12 @@ void
 ProgressWindow::Start(BWindow* referenceWindow)
 {
 	BAutolock _(this);
+
 	_Center(referenceWindow);
 
+	if (referenceWindow != NULL)
+		SetWorkspaces(referenceWindow->Workspaces());
+
 	fRetrievedUpdate = false;
 	fRetrievedShow = false;
 	delete fRunner;