diff --git a/src/client/clientmap.cpp b/src/client/clientmap.cpp
index 39c811b85..d987a2ee3 100644
--- a/src/client/clientmap.cpp
+++ b/src/client/clientmap.cpp
@@ -978,9 +978,10 @@ void ClientMap::renderMapShadows(video::IVideoDriver *driver,
 	std::vector<DrawDescriptor> draw_order;
 
 
-	int count = 0;
-	int low_bound = is_transparent_pass ? 0 : m_drawlist_shadow.size() / total_frames * frame;
-	int high_bound = is_transparent_pass ? m_drawlist_shadow.size() : m_drawlist_shadow.size() / total_frames * (frame + 1);
+	std::size_t count = 0;
+	std::size_t meshes_per_frame = m_drawlist_shadow.size() / total_frames + 1;
+	std::size_t low_bound = is_transparent_pass ? 0 : meshes_per_frame * frame;
+	std::size_t high_bound = is_transparent_pass ? m_drawlist_shadow.size() : meshes_per_frame * (frame + 1);
 
 	// transparent pass should be rendered in one go
 	if (is_transparent_pass && frame != total_frames - 1) {