diff --git a/classes.py b/classes.py
index 57b8ca4..8fd300d 100644
--- a/classes.py
+++ b/classes.py
@@ -1409,6 +1409,12 @@ class Protocol():
 
         return real_args
 
+    def hasCap(capab):
+        """
+        Returns whether this protocol module instance has the requested capability.
+        """
+        return capab.lower() in self.protocol_caps
+
     def removeClient(self, numeric):
         """Internal function to remove a client from our internal state."""
         for c, v in self.irc.channels.copy().items():