diff --git a/scene/2d/navigation_obstacle_2d.cpp b/scene/2d/navigation_obstacle_2d.cpp
index f3fa9e374..cccc540aa 100644
--- a/scene/2d/navigation_obstacle_2d.cpp
+++ b/scene/2d/navigation_obstacle_2d.cpp
@@ -188,7 +188,7 @@ NavigationObstacle2D::~NavigationObstacle2D() {
 }
 
 void NavigationObstacle2D::set_navigation(Navigation2D *p_nav) {
-	if (navigation == p_nav) {
+	if (navigation == p_nav && navigation != nullptr) {
 		return; // Pointless
 	}