diff --git a/render.cpp b/render.cpp
index a3cca04..dfdee3d 100644
--- a/render.cpp
+++ b/render.cpp
@@ -346,6 +346,7 @@ void grbl::program_renderer::initialize_program_buffers() {
 GLsizei grbl::program_renderer::update_model_vbo(const grbl::program &pgm) {
     if (!pgm.is_loaded) return 0;
 
+    min_pos = max_pos = glm::vec3(0);
     /*
     static auto movement_re = std::regex(R"(([gG]0*1?\s+|[xXyYzZ]\s*[0-9\.\-]+))");
     bool is_tool_on = false;