diff --git a/Lib/irix5/regen b/Lib/irix5/regen
new file mode 100755
index 00000000000..2f03cb403d3
--- /dev/null
+++ b/Lib/irix5/regen
@@ -0,0 +1,10 @@
+#! /bin/sh
+case `uname -sr` in
+'IRIX '[45].*)	;;
+*)	echo Probably not on a n IRIX system 1>&2
+	exit 1;;
+esac
+set -v
+h2py /usr/include/sys/fcntl.h
+h2py /usr/include/sys/socket.h
+h2py -i '(u_long)' /usr/include/netinet/in.h
diff --git a/Lib/plat-irix5/regen b/Lib/plat-irix5/regen
new file mode 100755
index 00000000000..2f03cb403d3
--- /dev/null
+++ b/Lib/plat-irix5/regen
@@ -0,0 +1,10 @@
+#! /bin/sh
+case `uname -sr` in
+'IRIX '[45].*)	;;
+*)	echo Probably not on a n IRIX system 1>&2
+	exit 1;;
+esac
+set -v
+h2py /usr/include/sys/fcntl.h
+h2py /usr/include/sys/socket.h
+h2py -i '(u_long)' /usr/include/netinet/in.h