diff --git a/ircrobots/server.py b/ircrobots/server.py
index 2cf391e..ff97a5c 100644
--- a/ircrobots/server.py
+++ b/ircrobots/server.py
@@ -172,7 +172,7 @@ class Server(IServer):
             chan = self.casefold(line.params[1])
             if (self._pending_who and
                     self._pending_who[0] == chan):
-                self._pending_who.pop()
+                self._pending_who.popleft()
                 await self._next_who()
 
         elif (line.command == ERR_NICKNAMEINUSE and