diff --git a/headers/posix/sys/sockio.h b/headers/posix/sys/sockio.h
index f126bacc63..0d6f4d3717 100644
--- a/headers/posix/sys/sockio.h
+++ b/headers/posix/sys/sockio.h
@@ -60,6 +60,6 @@
 #define SIOCSIFGENERIC		8945	/* generic IF set op */
 #define SIOCGIFGENERIC		8946	/* generic IF get op */
 
-#define SIOCEND				8946	/* Always set to highest SIOC* */
+#define SIOCEND				9000	/* SIOCEND >= highest SIOC* */
 
 #endif	/* _SYS_SOCKIO_H */