diff --git a/man2/reboot.2 b/man2/reboot.2
index 7521d529a..ee8456365 100644
--- a/man2/reboot.2
+++ b/man2/reboot.2
@@ -29,10 +29,8 @@
 .SH NAME
 reboot \- reboot or enable/disable Ctrl-Alt-Del
 .SH SYNOPSIS
-/* For libc4 and libc5 the library call and the system call
-   are identical, and since kernel version 2.1.30 there are
-   symbolic names LINUX_REBOOT_* for the constants and a
-   fourth argument to the call: */
+/* Since kernel version 2.1.30 there are symbolic names LINUX_REBOOT_*
+   for the constants and a fourth argument to the call: */
 .sp
 .B #include <unistd.h>
 .br