diff --git a/krfb/configuration.cc b/krfb/configuration.cc
index f0595ca..e4b758a 100644
--- a/krfb/configuration.cc
+++ b/krfb/configuration.cc
@@ -30,13 +30,25 @@
 #include <qlineedit.h>
 #include <qcheckbox.h>
 
+ManageInvitationsDialog2::ManageInvitationsDialog2() :
+  ManageInvitationsDialog(0, 0, false, WShowModal)
+{ }
 void ManageInvitationsDialog2::closeEvent(QCloseEvent *)
 { emit closed(); }
+
+InvitationDialog2::InvitationDialog2() :
+  InvitationDialog(0, 0, false, WShowModal)
+{ }
 void InvitationDialog2::closeEvent(QCloseEvent *)
 { emit closed(); }
+
+PersonalInvitationDialog2::PersonalInvitationDialog2() :
+  PersonalInvitationDialog(0, 0, false, WShowModal)
+{ }
 void PersonalInvitationDialog2::closeEvent(QCloseEvent *)
 { emit closed(); }
 
+
 Configuration::Configuration(krfb_mode mode) :
 	m_mode(mode),
 	portNum(-1)
diff --git a/krfb/configuration.h b/krfb/configuration.h
index 05c5736..5b84009 100644
--- a/krfb/configuration.h
+++ b/krfb/configuration.h
@@ -40,6 +40,7 @@ enum krfb_mode {
 class ManageInvitationsDialog2 : public ManageInvitationsDialog {
 	Q_OBJECT
 public:
+	ManageInvitationsDialog2();
 	virtual void closeEvent(QCloseEvent *);
 signals:
 	void closed();
@@ -47,6 +48,7 @@ signals:
 class InvitationDialog2 : public InvitationDialog {
 	Q_OBJECT
 public:
+	InvitationDialog2();
 	virtual void closeEvent(QCloseEvent *);
 signals:
 	void closed();
@@ -54,6 +56,7 @@ signals:
 class PersonalInvitationDialog2 : public PersonalInvitationDialog {
 	Q_OBJECT
 public:
+	PersonalInvitationDialog2();
 	virtual void closeEvent(QCloseEvent *);
 signals:
 	void closed();