diff --git a/servers/navigation/navigation_mesh_generator.cpp b/servers/navigation/navigation_mesh_generator.cpp
index a89c75b42..48042682a 100644
--- a/servers/navigation/navigation_mesh_generator.cpp
+++ b/servers/navigation/navigation_mesh_generator.cpp
@@ -142,7 +142,9 @@ int NavigationMeshGeneratorManager::find_server_id(const String &p_name) const {
 }
 
 NavigationMeshGenerator *NavigationMeshGeneratorManager::new_default_server() const {
-	ERR_FAIL_COND_V(default_server_id == -1, nullptr);
+	if (default_server_id == -1) {
+		return NULL;
+	}
 
 	NavigationMeshGenerator *gen = navigation_mesh_generators[default_server_id].create_callback();