diff --git a/Makefile.inc1 b/Makefile.inc1
index e03fbd675e42..5061388da827 100644
--- a/Makefile.inc1
+++ b/Makefile.inc1
@@ -1,5 +1,5 @@
 #
-#	$Id: Makefile.inc1,v 1.67 1999/03/31 06:42:36 obrien Exp $
+#	$Id: Makefile.inc1,v 1.68 1999/04/02 15:37:07 peter Exp $
 #
 # Make command line options:
 #	-DCLOBBER will remove /usr/include
@@ -522,6 +522,7 @@ includes:
 	cd ${.CURDIR}/gnu/lib/libg++;		${MAKE} beforeinstall
 	cd ${.CURDIR}/gnu/lib/libdialog;	${MAKE} beforeinstall
 	cd ${.CURDIR}/gnu/lib/libgmp;		${MAKE} beforeinstall
+	cd ${.CURDIR}/gnu/usr.bin/cc/cc1plus;	${MAKE} beforeinstall
 .if exists(secure) && !defined(NOCRYPT)
 	cd ${.CURDIR}/secure/lib/libdes;	${MAKE} beforeinstall
 .endif