diff --git a/src/ircmsgs.py b/src/ircmsgs.py
index 25233eaab..9b69f7704 100644
--- a/src/ircmsgs.py
+++ b/src/ircmsgs.py
@@ -221,6 +221,19 @@ def isAction(msg):
     else:
         return False
 
+def isSplit(msg):
+    if msg.command == 'QUIT':
+        # It's a quit.
+        quitmsg = msg.args[0]
+        if not quitmsg.startswith('"') and not quitmsg.endswith('"'):
+            # It's not a user-generated quitmsg.
+            servers = quitmsg.split()
+            if len(servers) == 2:
+                # We could check if domains match, or if the hostnames actually
+                # resolve, but we're going to put that off for now.
+                return True
+    return False
+
 _unactionre = re.compile(r'^\x01ACTION\s+(.*)\x01$')
 def unAction(msg):
     """Returns the payload (i.e., non-ACTION text) of an ACTION msg."""
diff --git a/test/test_ircmsgs.py b/test/test_ircmsgs.py
index 84a9b3caa..df4fb4d9f 100644
--- a/test/test_ircmsgs.py
+++ b/test/test_ircmsgs.py
@@ -239,5 +239,19 @@ class FunctionsTestCase(SupyTestCase):
         s = str(m)
         self.assertEqual(s, 'MODE #foo -b :foo!bar@baz\r\n')
 
+    def testIsSplit(self):
+        m = ircmsgs.IrcMsg(prefix="caker!~caker@ns.theshore.net",
+                           command="QUIT",
+                           args=('jupiter.oftc.net quasar.oftc.net',))
+        self.failUnless(ircmsgs.isSplit(m))
+        m = ircmsgs.IrcMsg(prefix="bzbot!Brad2901@ACC87473.ipt.aol.com",
+                           command="QUIT",
+                           args=('Read error: 110 (Connection timed out)',))
+        self.failIf(ircmsgs.isSplit(m))
+        m = ircmsgs.IrcMsg(prefix="JibberJim!~none@8212cl.b0nwbeoe.co.uk",
+                           command="QUIT",
+                           args=('"Bye!"',))
+        self.failIf(ircmsgs.isSplit(m))
+
 
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