diff --git a/contrib/pf/libevent/event.h b/contrib/pf/libevent/event.h
index 3f2032dd068..0c19201611b 100644
--- a/contrib/pf/libevent/event.h
+++ b/contrib/pf/libevent/event.h
@@ -73,7 +73,6 @@ struct {								\
 	struct type *rbe_left;		/* left element */		\
 	struct type *rbe_right;		/* right element */		\
 	struct type *rbe_parent;	/* parent element */		\
-	int rbe_color;			/* node color */		\
 }
 #endif /* !RB_ENTRY */