diff --git a/deflect/qt/QuickRenderer.cpp b/deflect/qt/QuickRenderer.cpp
index 6cc3d69..63a48ec 100644
--- a/deflect/qt/QuickRenderer.cpp
+++ b/deflect/qt/QuickRenderer.cpp
@@ -226,6 +226,8 @@ void QuickRenderer::_onStop()
     if (_context)
         _context->makeCurrent(_getSurface());
 
+    emit stopping();
+
     _renderControl.invalidate();
 
     _fbo.reset();
diff --git a/deflect/qt/QuickRenderer.h b/deflect/qt/QuickRenderer.h
index e3bb554..4a3d265 100644
--- a/deflect/qt/QuickRenderer.h
+++ b/deflect/qt/QuickRenderer.h
@@ -135,6 +135,12 @@ class QuickRenderer : public QObject
      */
     void afterRender();
 
+    /**
+     * Emitted from the render thread during stop(). Can be used to do some last
+     * cleanup operations while the GL context is bound.
+     */
+    void stopping();
+
 private:
     QQuickWindow& _quickWindow;
     QQuickRenderControl& _renderControl;
diff --git a/doc/Changelog.md b/doc/Changelog.md
index d313154..110e80c 100644
--- a/doc/Changelog.md
+++ b/doc/Changelog.md
@@ -5,6 +5,8 @@ Changelog {#Changelog}
 
 ### 0.14.0 (git master)
 
+* [179](https://github.com/BlueBrain/Deflect/pull/179):
+  Added stopping() signal to qt::QuickRenderer for GL cleanup operations.
 * [177](https://github.com/BlueBrain/Deflect/pull/177):
   Improve stream error handling
   * Catch errors regarding invalid JPEG quality values