5 files changed, 8 insertions, 8 deletions
diff --git a/xmpp-vala/src/module/iq/module.vala b/xmpp-vala/src/module/iq/module.vala
index abcc271c..f73f5459 100644
--- a/xmpp-vala/src/module/iq/module.vala
+++ b/xmpp-vala/src/module/iq/module.vala
@@ -83,8 +83,14 @@ namespace Xmpp.Iq {
     }
 
     public interface Handler : Object {
-        public abstract void on_iq_get(XmppStream stream, Iq.Stanza iq);
-        public abstract void on_iq_set(XmppStream stream, Iq.Stanza iq);
+        public virtual void on_iq_get(XmppStream stream, Iq.Stanza iq) {
+            Iq.Stanza bad_request = new Iq.Stanza.error(iq, new ErrorStanza.bad_request("unexpected IQ get for this namespace"));
+            stream.get_module(Module.IDENTITY).send_iq(stream, bad_request);
+        }
+        public virtual void on_iq_set(XmppStream stream, Iq.Stanza iq) {
+            Iq.Stanza bad_request = new Iq.Stanza.error(iq, new ErrorStanza.bad_request("unexpected IQ set for this namespace"));
+            stream.get_module(Module.IDENTITY).send_iq(stream, bad_request);
+        }
     }
 
 }
diff --git a/xmpp-vala/src/module/roster/module.vala b/xmpp-vala/src/module/roster/module.vala
index 2d36211d..7a69abe9 100644
--- a/xmpp-vala/src/module/roster/module.vala
+++ b/xmpp-vala/src/module/roster/module.vala
@@ -66,8 +66,6 @@ public class Module : XmppStreamModule, Iq.Handler {
         }
     }
 
-    public void on_iq_get(XmppStream stream, Iq.Stanza iq) { }
-
     public override void attach(XmppStream stream) {
         stream.get_module(Iq.Module.IDENTITY).register_for_namespace(NS_URI, this);
         stream.get_module(Presence.Module.IDENTITY).initial_presence_sent.connect(roster_get);
diff --git a/xmpp-vala/src/module/xep/0030_service_discovery/module.vala b/xmpp-vala/src/module/xep/0030_service_discovery/module.vala
index 2b955738..e2bb46f8 100644
--- a/xmpp-vala/src/module/xep/0030_service_discovery/module.vala
+++ b/xmpp-vala/src/module/xep/0030_service_discovery/module.vala
@@ -66,8 +66,6 @@ public class Module : XmppStreamModule, Iq.Handler {
         }
     }
 
-    public void on_iq_set(XmppStream stream, Iq.Stanza iq) { }
-
     public override void attach(XmppStream stream) {
         stream.add_flag(new Flag());
         stream.get_module(Iq.Module.IDENTITY).register_for_namespace(NS_URI_INFO, this);
diff --git a/xmpp-vala/src/module/xep/0191_blocking_command.vala b/xmpp-vala/src/module/xep/0191_blocking_command.vala
index 4b78ed33..ee8a1fed 100644
--- a/xmpp-vala/src/module/xep/0191_blocking_command.vala
+++ b/xmpp-vala/src/module/xep/0191_blocking_command.vala
@@ -45,7 +45,6 @@ public class Module : XmppStreamModule, Iq.Handler {
         return stream.has_flag(Flag.IDENTITY);
     }
 
-    private void on_iq_get(XmppStream stream, Iq.Stanza iq) { }
     private void on_iq_set(XmppStream stream, Iq.Stanza iq) {
         StanzaNode? block_node = iq.stanza.get_subnode("block", NS_URI);
         StanzaNode? unblock_node = iq.stanza.get_subnode("unblock", NS_URI);
diff --git a/xmpp-vala/src/module/xep/0199_ping.vala b/xmpp-vala/src/module/xep/0199_ping.vala
index 661ad253..3458fa9d 100644
--- a/xmpp-vala/src/module/xep/0199_ping.vala
+++ b/xmpp-vala/src/module/xep/0199_ping.vala
@@ -27,7 +27,6 @@ namespace Xmpp.Xep.Ping {
         public void on_iq_get(XmppStream stream, Iq.Stanza iq) {
             stream.get_module(Iq.Module.IDENTITY).send_iq(stream, new Iq.Stanza.result(iq));
         }
-        public void on_iq_set(XmppStream stream, Iq.Stanza iq) { }
 
         public override string get_ns() { return NS_URI; }
         public override string get_id() { return IDENTITY.id; }