diff --git a/scene/3d/collision_polygon.cpp b/scene/3d/collision_polygon.cpp
index 37aa95fb43a..a59cce5c66e 100644
--- a/scene/3d/collision_polygon.cpp
+++ b/scene/3d/collision_polygon.cpp
@@ -44,7 +44,7 @@ void CollisionPolygon::_build_polygon() {
 	if (polygon.size() == 0)
 		return;
 
-	Vector<Vector<Vector2> > decomp = Geometry::decompose_polygon(polygon);
+	Vector<Vector<Vector2> > decomp = Geometry::decompose_polygon_in_convex(polygon);
 	if (decomp.size() == 0)
 		return;