diff --git a/src/common/helpers.py b/src/common/helpers.py
index d306f9ec8..25255655f 100644
--- a/src/common/helpers.py
+++ b/src/common/helpers.py
@@ -1318,6 +1318,8 @@ def update_optional_features(account = None):
             gajim.gajim_optional_features[a].append(xmpp.NS_JINGLE_ICE_UDP)
             gajim.gajim_optional_features[a].append(xmpp.NS_JINGLE_FILE_TRANSFER)
             gajim.gajim_optional_features[a].append(xmpp.NS_JINGLE_XTLS)
+            gajim.gajim_optional_features[a].append(xmpp.NS_JINGLE_BYTESTREAM)
+            gajim.gajim_optional_features[a].append(xmpp.NS_JINGLE_IBB)
         gajim.caps_hash[a] = caps_cache.compute_caps_hash([gajim.gajim_identity],
                 gajim.gajim_common_features + gajim.gajim_optional_features[a])
         # re-send presence with new hash