diff --git a/hurd/hurdioctl.c b/hurd/hurdioctl.c
index c4cb6798c2..25c409aedb 100644
--- a/hurd/hurdioctl.c
+++ b/hurd/hurdioctl.c
@@ -21,7 +21,7 @@
 #include <hurd/fd.h>
 #include <sys/ioctl.h>
 #include <hurd/ioctl.h>
-
+#include <string.h>
 
 
 /* Symbol set of ioctl handler lists.  If there are user-registered