diff --git a/subprojects/gst-plugins-good/ext/qt/qtwindow.cc b/subprojects/gst-plugins-good/ext/qt/qtwindow.cc
index daec3222b7..2872cb5c2f 100644
--- a/subprojects/gst-plugins-good/ext/qt/qtwindow.cc
+++ b/subprojects/gst-plugins-good/ext/qt/qtwindow.cc
@@ -123,6 +123,8 @@ QtGLWindow::~QtGLWindow()
     gst_object_unref(this->priv->display);
   if (this->priv->context)
     gst_object_unref(this->priv->context);
+  if (this->priv->caps)
+      gst_caps_unref(this->priv->caps);
   g_free (this->priv);
   this->priv = NULL;
 }