diff --git a/lib/bind/port_before.h.in b/lib/bind/port_before.h.in
index 5cddec8561..25b376cd48 100644
--- a/lib/bind/port_before.h.in
+++ b/lib/bind/port_before.h.in
@@ -13,6 +13,7 @@
 @GETNETBYADDR_ADDR_T@
 @SETPWENT_VOID@
 @SETGRENT_VOID@
+@POSIX_GETGRGID_R@
 
 @NET_R_ARGS@
 @NET_R_BAD@