diff --git a/sleekxmpp/basexmpp.py b/sleekxmpp/basexmpp.py
index 816f2fc..7c13125 100644
--- a/sleekxmpp/basexmpp.py
+++ b/sleekxmpp/basexmpp.py
@@ -138,6 +138,17 @@ class BaseXMPP(XMLStream):
         register_stanza_plugin(Message, Nick)
         register_stanza_plugin(Message, HTMLIM)
 
+    def start_stream_handler(self, xml):
+        """
+        Save the stream ID once the streams have been established.
+
+        Overrides XMLStream.start_stream_handler.
+
+        Arguments:
+            xml -- The incoming stream's root element.
+        """
+        self.stream_id = xml.get('id', '')
+
     def process(self, *args, **kwargs):
         """
         Overrides XMLStream.process.
diff --git a/sleekxmpp/componentxmpp.py b/sleekxmpp/componentxmpp.py
index f9e7da4..ed96016 100644
--- a/sleekxmpp/componentxmpp.py
+++ b/sleekxmpp/componentxmpp.py
@@ -115,11 +115,13 @@ class ComponentXMPP(BaseXMPP):
         Once the streams are established, attempt to handshake
         with the server to be accepted as a component.
 
-        Overrides XMLStream.start_stream_handler.
+        Overrides BaseXMPP.start_stream_handler.
 
         Arguments:
             xml -- The incoming stream's root element.
         """
+        BaseXMPP.start_stream_handler(self, xml)
+
         # Construct a hash of the stream ID and the component secret.
         sid = xml.get('id', '')
         pre_hash = '%s%s' % (sid, self.secret)