diff --git a/sysdeps/mach/hurd/ioctl.c b/sysdeps/mach/hurd/ioctl.c
index 12b21d36fc..5c6138fc0b 100644
--- a/sysdeps/mach/hurd/ioctl.c
+++ b/sysdeps/mach/hurd/ioctl.c
@@ -97,7 +97,6 @@ __ioctl (int fd, unsigned long int request, ...)
 		  *t = io2mach_type (count, type);
 		  p = __mempcpy (p, argptr, len);
 		  argptr += len;
-		  p += len;
 		  p = (void *) (((uintptr_t) p + sizeof (*t) - 1)
 				& ~(sizeof (*t) - 1));
 		  t = p;