diff --git a/src/servers/app/DefaultDecorator.cpp b/src/servers/app/DefaultDecorator.cpp
index 1fe54f63b2..4bb3bccbed 100644
--- a/src/servers/app/DefaultDecorator.cpp
+++ b/src/servers/app/DefaultDecorator.cpp
@@ -754,11 +754,7 @@ DefaultDecorator::_SetTitle(const char* string, BRegion* updateRegion)
 	if (updateRegion == NULL)
 		return;
 
-	BRect updatedRect = TabRect();
-	if (rect.left > updatedRect.left)
-		rect.left = updatedRect.left;
-	if (rect.right < updatedRect.right)
-		rect.right = updatedRect.right;
+	rect = rect | TabRect();
 
 	rect.bottom++;
 		// the border will look differently when the title is adjacent