diff --git a/irc.go b/irc.go
index e30161b..dca8855 100644
--- a/irc.go
+++ b/irc.go
@@ -145,6 +145,8 @@ func (c *Connection) parseMessage(line string) {
 				if c.PartCallback != nil {
 					c.PartCallback(from, target, msg)
 				}
+			default:
+				log.Printf("unhandled command: %s %s %s", cmd, target, msg)
 			}
 		}
 	}