diff --git a/math/entropy/Makefile b/math/entropy/Makefile
index 4b4d528a081a..82760a2961bf 100644
--- a/math/entropy/Makefile
+++ b/math/entropy/Makefile
@@ -9,9 +9,6 @@ MASTER_SITES=	http://www.seccuris.com/documents/downloads/
 MAINTAINER=	csjp@FreeBSD.org
 COMMENT=	Calculate data entropy to benchmark compression algorithms
 
-MAN1=		entropy.1
-MANCOMPRESSED=	yes
-PLIST_FILES=	bin/entropy
+PLIST_FILES=	bin/entropy man/man1/entropy.1.gz
 
-NO_STAGE=	yes
 .include <bsd.port.mk>
diff --git a/math/entropy/files/patch-Makefile b/math/entropy/files/patch-Makefile
new file mode 100644
index 000000000000..652b7710924a
--- /dev/null
+++ b/math/entropy/files/patch-Makefile
@@ -0,0 +1,13 @@
+--- Makefile.orig	2014-06-18 18:11:21.760498422 +0800
++++ Makefile	2014-06-18 18:11:35.534517376 +0800
+@@ -12,8 +12,8 @@ entropy:	$(OBJS)
+ 	$(CC) -o $(PROG) $(OBJS) $(LIBS)
+ 
+ install:
+-	cp entropy.1.gz $(PREFIX)/man/man1/
+-	cp entropy $(PREFIX)/bin
++	cp entropy.1.gz $(DESTDIR)$(PREFIX)/man/man1/
++	cp entropy $(DESTDIR)$(PREFIX)/bin
+ 
+ deinstall:
+ 	rm -f $(PREFIX)/man/man1/entropy.1.gz