1 files changed, 2 insertions, 0 deletions
diff --git a/gr-qtgui/lib/sink_c_impl.h b/gr-qtgui/lib/sink_c_impl.h
index b201bcd5a2..ddfb0865d5 100644
--- a/gr-qtgui/lib/sink_c_impl.h
+++ b/gr-qtgui/lib/sink_c_impl.h
@@ -76,6 +76,8 @@ namespace gr {
 		  QWidget *parent);
       ~sink_c_impl();
 
+      bool check_topology(int ninputs, int noutputs);
+
       void exec_();
       QWidget*  qwidget();
       PyObject* pyqwidget();