diff --git a/man3/__ppc_set_ppr_med.3 b/man3/__ppc_set_ppr_med.3
index a98107bc9..ab9e7fcee 100644
--- a/man3/__ppc_set_ppr_med.3
+++ b/man3/__ppc_set_ppr_med.3
@@ -1,4 +1,4 @@
-.\" Copyright (c) 2015, IBM Corporation.
+.\" Copyright (c) 2015, 2016 IBM Corporation.
 .\"
 .\" %%%LICENSE_START(VERBATIM)
 .\" Permission is granted to make and distribute verbatim copies of this
@@ -115,6 +115,18 @@ T}	Thread safety	MT-Safe
 .ad
 .SH CONFORMING TO
 These functions are nonstandard GNU extensions.
+.SH AVAILABILITY
+The functions
+.BR __ppc_set_ppr_very_low ()
+and
+.BR __ppc_set_ppr_med_high ()
+will be defined by
+.I <sys/platform/ppc.h>
+if
+.B _ARCH_PWR8
+is defined.
+Availability of these functions can be tested using
+.BR "#ifdef _ARCH_PWR8" .
 .SH SEE ALSO
 .BR __ppc_yield (3)