diff --git a/sys/sys/ck.h b/sys/sys/ck.h
--- a/sys/sys/ck.h
+++ b/sys/sys/ck.h
@@ -13,6 +13,8 @@
 #define CK_STAILQ_ENTRY STAILQ_ENTRY
 #define CK_LIST_HEAD LIST_HEAD
 #define CK_LIST_ENTRY LIST_ENTRY
+#define CK_SLIST_HEAD SLIST_HEAD
+#define CK_SLIST_ENTRY SLIST_ENTRY
 #endif
 
 #endif /* !_SYS_CK_H_ */