diff --git a/lib/gssapi/mech/mechqueue.h b/lib/gssapi/mech/mechqueue.h
index 8ed5d707b..95941bab7 100644
--- a/lib/gssapi/mech/mechqueue.h
+++ b/lib/gssapi/mech/mechqueue.h
@@ -34,8 +34,6 @@
 #ifndef	_MECHQUEUE_H_
 #define	_MECHQUEUE_H_
 
-#ifndef HEIM_SLIST_HEAD
-
 /*
  * Singly-linked List definitions.
  */
@@ -96,6 +94,4 @@ struct {								\
 #define	HEIM_SLIST_FIRST(head)	((head)->slh_first)
 #define	HEIM_SLIST_NEXT(elm, field)	((elm)->field.sle_next)
 
-#endif /* HEIM_SLIST_HEAD */
-
 #endif	/* !_MECHQUEUE_H_ */