diff --git a/3d-viewer/3d_viewer/eda_3d_viewer.cpp b/3d-viewer/3d_viewer/eda_3d_viewer.cpp
index 23db2b231f..d6716ac041 100644
--- a/3d-viewer/3d_viewer/eda_3d_viewer.cpp
+++ b/3d-viewer/3d_viewer/eda_3d_viewer.cpp
@@ -164,6 +164,7 @@ EDA_3D_VIEWER::EDA_3D_VIEWER( KIWAY *aKiway, PCB_BASE_FRAME *aParent,
 
     m_canvas = NULL;
     m_disable_ray_tracing = false;
+    m_mainToolBar = nullptr;
 
     // Give it an icon
     wxIcon icon;