diff --git a/editor/tests/path-test.cpp b/editor/tests/path-test.cpp
index b5161e9f..84886a65 100644
--- a/editor/tests/path-test.cpp
+++ b/editor/tests/path-test.cpp
@@ -30,7 +30,7 @@ struct path_test final : base_test
         point from, to;
         object_id own_id;
         uint32_t max_dist;
-        Vector2ub own_size;
+        Vector2ui own_size;
     } pending = {};
 
     struct result_s
@@ -67,7 +67,8 @@ bool path_test::handle_mouse_click(app& a, const mouse_button_event& e, bool is_
 
             has_pending = true;
             pending = { .from = pt0, .to = *pt, .own_id = C->id,
-                        .max_dist = dist, .own_size = C->bbox_size, };
+                        .max_dist = dist,
+                        .own_size = Vector2ui(C->bbox_size) + Vector2ui(2), };
         }
         return true;
     }
diff --git a/src/search-astar.cpp b/src/search-astar.cpp
index 1f1663f9..e86e6bee 100644
--- a/src/search-astar.cpp
+++ b/src/search-astar.cpp
@@ -192,7 +192,7 @@ uint32_t astar::pop_from_heap()
 }
 
 path_search_result astar::Dijkstra(world& w, const point from, const point to,
-                                   object_id own_id, uint32_t max_dist, Vector2ub own_size_,
+                                   object_id own_id, uint32_t max_dist, Vector2ui own_size_,
                                    int debug, const pred& p)
 {
 #ifdef FM_NO_DEBUG
@@ -207,7 +207,9 @@ path_search_result astar::Dijkstra(world& w, const point from, const point to,
     auto& cache = *_cache;
     cache.allocate(from, max_dist);
 
-    const auto own_size = Math::max(Vector2ui(own_size_), min_size);
+    constexpr auto size_max = uint32_t{tile_size_xy}*uint32_t{TILE_MAX_DIM};
+    fm_assert(own_size_ < Vector2ui{size_max});
+    const auto own_size = Math::max(own_size_, min_size);
     constexpr auto goal_thres = (uint32_t)(div_size.length() + 1.5f);
 
     if (from.coord().z() != to.coord().z()) [[unlikely]]
diff --git a/src/search-astar.hpp b/src/search-astar.hpp
index 61553f80..dee9f5d6 100644
--- a/src/search-astar.hpp
+++ b/src/search-astar.hpp
@@ -26,7 +26,7 @@ class astar
 
     // todo add simple bresenham short-circuit
     path_search_result Dijkstra(world& w, point from, point to,
-                                object_id own_id, uint32_t max_dist, Vector2ub own_size,
+                                object_id own_id, uint32_t max_dist, Vector2ui own_size,
                                 int debug = 0, const pred& p = Search::never_continue());
 
 private: