diff --git a/src/providers/wms/qgswmsconnection.h b/src/providers/wms/qgswmsconnection.h
index 3c1e4bdc325..b35dd528f26 100644
--- a/src/providers/wms/qgswmsconnection.h
+++ b/src/providers/wms/qgswmsconnection.h
@@ -27,6 +27,8 @@
 class QgsWMSConnection : public QgsOwsConnection
 {
 
+    Q_OBJECT
+
   public:
     //! Constructor
     explicit QgsWMSConnection( const QString &connName );