diff --git a/gst/monoscope/gstmonoscope.c b/gst/monoscope/gstmonoscope.c
index 3e702562cd..8aebbdbfbc 100644
--- a/gst/monoscope/gstmonoscope.c
+++ b/gst/monoscope/gstmonoscope.c
@@ -312,8 +312,13 @@ ensure_negotiated (GstMonoscope * monoscope)
 
   /* we don't know an output format yet, pick one */
   if (reconfigure || !gst_pad_has_current_caps (monoscope->srcpad)) {
-    if (!gst_monoscope_src_negotiate (monoscope))
-      return GST_FLOW_NOT_NEGOTIATED;
+    if (!gst_monoscope_src_negotiate (monoscope)) {
+      gst_pad_mark_reconfigure (monoscope->srcpad);
+      if (GST_PAD_IS_FLUSHING (monoscope->srcpad))
+        return GST_FLOW_FLUSHING;
+      else
+        return GST_FLOW_NOT_NEGOTIATED;
+    }
   }
   return GST_FLOW_OK;
 }