diff --git a/man2/add_key.2 b/man2/add_key.2
index f3d803adf..dca44b8e7 100644
--- a/man2/add_key.2
+++ b/man2/add_key.2
@@ -14,7 +14,6 @@
 add_key \- add a key to the kernel's key management facility
 .SH SYNOPSIS
 .nf
-.B #include <sys/types.h>
 .B #include <keyutils.h>
 .PP
 .BI "key_serial_t add_key(const char *" type ", const char *" description ,