diff --git a/src/Cockpit/panel.cxx b/src/Cockpit/panel.cxx
index d59322318..4483dfa2a 100644
--- a/src/Cockpit/panel.cxx
+++ b/src/Cockpit/panel.cxx
@@ -346,7 +346,9 @@ FGPanel::update (GLfloat winx, GLfloat winw, GLfloat winy, GLfloat winh)
   
   glTranslated(x_offset, y_offset, 0);
   
+  glDepthMask(GL_FALSE);
   draw();
+  glDepthMask(GL_TRUE);
 
   glMatrixMode(GL_PROJECTION);
   glPopMatrix();
diff --git a/src/Model/panelnode.cxx b/src/Model/panelnode.cxx
index 55973b003..eedfed768 100644
--- a/src/Model/panelnode.cxx
+++ b/src/Model/panelnode.cxx
@@ -142,8 +142,12 @@ void FGPanelNode::draw_geometry()
     glGetFloatv(GL_PROJECTION_MATRIX, _lastProjection);
     glGetIntegerv(GL_VIEWPORT, _lastViewport);
 
+    glDepthMask( GL_FALSE );
+
     _panel->draw();
 
+    glDepthMask( GL_TRUE );
+
 
     glPopMatrix();
 }