diff --git a/geom/sample/edge.hpp b/geom/sample/edge.hpp
index 644d1c2c..3d1d136e 100644
--- a/geom/sample/edge.hpp
+++ b/geom/sample/edge.hpp
@@ -50,13 +50,13 @@ namespace cruft::geom::sample {
 
             if (pos <= w) {
                 auto const _w = pos;
-                auto const _h = cruft::random::uniform (1) ? h : 0;
+                auto const _h = cruft::random::uniform (1, gen) ? h : 0;
                 return { _w, _h };
             }
 
             pos -= w;
 
-            auto const _w = cruft::random::uniform (1) ? w : 0;
+            auto const _w = cruft::random::uniform (1, gen) ? w : 0;
             auto const _h = pos;
 
             return { _w, _h };