diff --git a/flist.h b/flist.h
index 7aca973..8e13041 100644
--- a/flist.h
+++ b/flist.h
@@ -176,4 +176,7 @@
 	for (pos = (head)->next, n = pos->next; pos != (head); \
 		pos = n, n = pos->next)
 
+extern void flist_sort(void *priv, struct flist_head *head,
+	int (*cmp)(void *priv, struct flist_head *a, struct flist_head *b));
+
 #endif