diff --git a/gnu/usr.bin/groff/Makefile.cfg b/gnu/usr.bin/groff/Makefile.cfg
index 3d68b68a1e2a..37b627cac19c 100644
--- a/gnu/usr.bin/groff/Makefile.cfg
+++ b/gnu/usr.bin/groff/Makefile.cfg
@@ -118,7 +118,7 @@ CFLAGS+=$(DEFINES)
 	-e "s;@TMAC_MDIR@;$(tmacdir)/mm;g" \
 	-e "s;@BROKEN_SPOOLER_FLAGS@;$(BROKEN_SPOOLER_FLAGS);g" \
 	-e "s;@VERSION@;`cat ${.CURDIR}/../VERSION`;g" \
-	-e "s;@MDATE@;`$(SHELL) ${.CURDIR}/../mdate.sh $<`;g" \
+	-e "s;@MDATE@;`${.CURDIR}/../mdate.sh $<`;g" \
 	-e "s;@g@;$(g);g" \
 	-e "s;@G@;`echo $(g) | tr [a-z] [A-Z]`;g" \
 	$< >$@