Index: src/namespaces.h
==================================================================
--- src/namespaces.h
+++ src/namespaces.h
@@ -19,10 +19,11 @@
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
 #define XMPP_NS_BIND @"urn:ietf:params:xml:ns:xmpp-bind"
+#define XMPP_NS_CAPS @"http://jabber.org/protocol/caps"
 #define XMPP_NS_CLIENT @"jabber:client"
 #define XMPP_NS_DISCO_INFO @"http://jabber.org/protocol/disco#info"
 #define XMPP_NS_DISCO_ITEMS @"http://jabber.org/protocol/disco#items"
 #define XMPP_NS_ROSTER @"jabber:iq:roster"
 #define XMPP_NS_ROSTERVER @"urn:xmpp:features:rosterver"