diff --git a/sdrbase/dsp/replaybuffer.h b/sdrbase/dsp/replaybuffer.h
index bacc96663..f7dd2e4ed 100644
--- a/sdrbase/dsp/replaybuffer.h
+++ b/sdrbase/dsp/replaybuffer.h
@@ -209,6 +209,11 @@ private:
         return data;
     }
 
+    qint16 conv(FixReal data) const
+    {
+        return data; // FIXME:
+    }
+
     qint16 conv(float data) const
     {
         return (qint16)(data * SDR_RX_SCALEF);