diff --git a/dll/possum/llist.c b/dll/possum/llist.c
index b437524..a2bafee 100644
--- a/dll/possum/llist.c
+++ b/dll/possum/llist.c
@@ -1,4 +1,5 @@
 #include <stdlib.h>
+#include <string.h>
 #include "llist.h"
 
 llist *lmake(size_t size) {