diff --git a/src/slic3r/GUI/GLCanvas3D.cpp b/src/slic3r/GUI/GLCanvas3D.cpp
index bb2cb5e2d..48dc2e46e 100644
--- a/src/slic3r/GUI/GLCanvas3D.cpp
+++ b/src/slic3r/GUI/GLCanvas3D.cpp
@@ -2292,6 +2292,9 @@ void GLCanvas3D::on_size(wxSizeEvent& evt)
 
 void GLCanvas3D::on_idle(wxIdleEvent& evt)
 {
+    if (!m_initialized)
+        return;
+
     m_dirty |= m_toolbar.update_items_state();
     m_dirty |= m_view_toolbar.update_items_state();