1 files changed, 1 insertions, 1 deletions
diff --git a/io.c b/io.c
index dd37638be..086d0283a 100644
--- a/io.c
+++ b/io.c
@@ -353,7 +353,7 @@ int
 sys_ioctl(tcp)
 struct tcb *tcp;
 {
-	struct ioctlent *iop;
+	const struct ioctlent *iop;
 
 	if (entering(tcp)) {
 		tprintf("%ld, ", tcp->u_arg[0]);