diff --git a/libs/gfx/source/painter.cpp b/libs/gfx/source/painter.cpp
index 5a67ff13..690ae0a2 100644
--- a/libs/gfx/source/painter.cpp
+++ b/libs/gfx/source/painter.cpp
@@ -362,7 +362,7 @@ namespace psemek::gfx
 		float const r = width / 2.f;
 
 		auto const d = geom::normalized(p1 - p0);
-		geom::vector<float, 3> const o { -d[1], d[0], 0.f };
+		geom::vector<float, 3> const o = geom::normalized(geom::vector{ -d[1], d[0], 0.f });
 
 		impl().vertices.push_back({{p0[0] + r * o[0], p0[1] + r * o[1], p0[2]}, c});
 		impl().vertices.push_back({{p0[0] - r * o[0], p0[1] - r * o[1], p0[2]}, c});