diff --git a/www/thttpd/Makefile b/www/thttpd/Makefile
index 8b0e043ec401..f0801ba53539 100644
--- a/www/thttpd/Makefile
+++ b/www/thttpd/Makefile
@@ -20,6 +20,7 @@ MAINTAINER=	anders@FreeBSD.org
 IGNOREFILES=	notes.html
 
 GNU_CONFIGURE=	yes
+USE_REINPLACE=	yes
 
 MAN1=		makeweb.1 htpasswd.1
 MAN8=		thttpd.8 redirect.8 ssi.8 syslogtocern.8
@@ -61,6 +62,7 @@ do-install:
 	@if [ ! -f ${PREFIX}/etc/rc.d/thttpd.sh ]; then \
 		${ECHO} "Installing ${PREFIX}/etc/rc.d/thttpd.sh startup file."; \
 		${INSTALL_SCRIPT} -m 751 ${FILESDIR}/thttpd.sh ${PREFIX}/etc/rc.d/thttpd.sh; \
+		${REINPLACE_CMD} -e 's|%%PREFIX%%|${PREFIX}|g' ${PREFIX}/etc/rc.d/thttpd.sh; \
 	fi
 .if !defined(NOPORTDOCS)
 	@${MKDIR} ${PREFIX}/share/doc/thttpd
diff --git a/www/thttpd/files/thttpd.sh b/www/thttpd/files/thttpd.sh
index 6129c1145d58..e559a172d3f6 100644
--- a/www/thttpd/files/thttpd.sh
+++ b/www/thttpd/files/thttpd.sh
@@ -1,13 +1,11 @@
 #!/bin/sh
 
-if ! PREFIX=$(expr $0 : "\(/.*\)/etc/rc\.d/$(basename $0)\$"); then
-    echo "$0: Cannot determine the PREFIX" >&2
-    exit 1
-fi
-
 case "$1" in
 start)
-	[ -x ${PREFIX}/sbin/thttpd_wrapper ] && ${PREFIX}/sbin/thttpd_wrapper & && echo -n ' thttpd'
+	if [ -x %%PREFIX%%/sbin/thttpd_wrapper ]; then
+		%%PREFIX%%/sbin/thttpd_wrapper &
+		echo -n ' thttpd'
+	fi
 	;;
 stop)
 	kill `cat /var/run/thttpd_wrapper.pid` && killall thttpd && echo -n ' thttpd'