===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/share/mk/sys.mk,v
retrieving revision 1.77
retrieving revision 1.78
diff -u -r1.77 -r1.78
--- src/share/mk/sys.mk	2017/03/04 16:52:47	1.77
+++ src/share/mk/sys.mk	2017/07/01 14:41:54	1.78
@@ -1,4 +1,4 @@
-#	$OpenBSD: sys.mk,v 1.77 2017/03/04 16:52:47 deraadt Exp $
+#	$OpenBSD: sys.mk,v 1.78 2017/07/01 14:41:54 espie Exp $
 #	$NetBSD: sys.mk,v 1.27 1996/04/10 05:47:19 mycroft Exp $
 #	@(#)sys.mk	5.11 (Berkeley) 3/13/91
 
@@ -195,6 +195,7 @@
 	${LEX.l} ${.IMPSRC}
 	${COMPILE.c} -o ${.TARGET} lex.yy.c 
 	rm -f lex.yy.c
+	if test -f ${.TARGET:R}.d; then sed -i -e 's,lex.yy.c,${.IMPSRC},' ${.TARGET:R}.d; fi
 
 # Yacc
 .y:
@@ -208,6 +209,7 @@
 	${YACC.y} ${.IMPSRC}
 	${COMPILE.c} -o ${.TARGET} y.tab.c
 	rm -f y.tab.c
+	if test -f ${.TARGET:R}.d; then sed -i -e 's,y.tab.c,${.IMPSRC},' ${.TARGET:R}.d; fi
 
 # Shell
 .sh: