@@ -347,10 +347,15 @@
 
 - (BOOL)streamOpen
 {
 	return streamOpen;
 }
+
+- (BOOL)rosterVersioningSupported
+{
+	return rosterVersioningSupported;
+}
 
 - (BOOL)checkCertificateAndGetReason: (OFString**)reason
 {
 	X509Certificate *cert;
 	OFDictionary *SANs;
@@ -842,10 +847,14 @@
 	}
 
 	if (encryptionRequired && !encrypted)
 		/* TODO: Find/create an exception to throw here */
 		@throw [OFException exceptionWithClass: isa];
+
+	if ([element elementForName: @"ver"
+			  namespace: XMPP_NS_ROSTERVER] != nil)
+		rosterVersioningSupported = YES;
 
 	if (mechs != nil) {
 		OFEnumerator *enumerator;
 		OFXMLElement *mech;