diff --git a/repos/os/include/util/geometry.h b/repos/os/include/util/geometry.h
index 423cfd6f8..5fd266874 100644
--- a/repos/os/include/util/geometry.h
+++ b/repos/os/include/util/geometry.h
@@ -115,7 +115,7 @@ class Genode::Rect
 		Rect(Point<CT> p, Area<DT> a)
 		: _p1(p), _p2(p.x() + a.w() - 1, p.y() + a.h() - 1) { }
 
-		Rect() { }
+		Rect() : /* invalid */ _p1(1, 1), _p2(0, 0) { }
 
 		/**
 		 * Accessors