diff --git a/Configurations/unix-Makefile.tmpl b/Configurations/unix-Makefile.tmpl
index c24ba622ad0cd42df48fd31a03a0896f0eebe3cb..b2638329274dc2b3dc52c1740dbda30d194e5f93 100644
--- a/Configurations/unix-Makefile.tmpl
+++ b/Configurations/unix-Makefile.tmpl
@@ -302,7 +302,7 @@ distclean: clean
 depend:
 	@: {- output_off() if $disabled{makedepend}; "" -}
 	@if egrep "^# DO NOT DELETE THIS LINE" Makefile >/dev/null && [ -z "`find $(DEPS) -newer Makefile 2>/dev/null; exit 0`" ]; then :; else \
-	  ( sed -e '/^# DO NOT DELETE THIS LINE.*/,$$d' < Makefile; \
+	  ( $(PERL) -pe 'exit 0 if /^# DO NOT DELETE THIS LINE.*/' < Makefile; \
 	    echo '# DO NOT DELETE THIS LINE -- make depend depends on it.'; \
 	    echo; \
 	    for f in $(DEPS); do \