diff --git a/src/meshlabplugins/filter_ssynth/filter_ssynth.h b/src/meshlabplugins/filter_ssynth/filter_ssynth.h
index 91a3b6859..c1fffe920 100644
--- a/src/meshlabplugins/filter_ssynth/filter_ssynth.h
+++ b/src/meshlabplugins/filter_ssynth/filter_ssynth.h
@@ -34,7 +34,7 @@
 class FilterSSynth : public QObject,public MeshIOInterface, public MeshFilterInterface{
     Q_OBJECT
     MESHLAB_PLUGIN_IID_EXPORTER(MESH_FILTER_INTERFACE_IID)
-    Q_INTERFACES(MeshFilterInterface)
+    Q_INTERFACES(MeshFilterInterface MeshIOInterface)
 public:
     enum {CR_SSYNTH} ;