diff --git a/biology/platon/Makefile b/biology/platon/Makefile
index 868e3a8973c0..e4cf475125d2 100644
--- a/biology/platon/Makefile
+++ b/biology/platon/Makefile
@@ -7,6 +7,7 @@
 
 PORTNAME=	platon
 PORTVERSION=	2001.03.09
+PORTREVISION=	1
 CATEGORIES=	biology
 MASTER_SITES=	ftp://xraysoft.chem.uu.nl/pub/unix/
 DISTNAME=	platon
diff --git a/biology/platon/files/Makefile b/biology/platon/files/Makefile
index d37f5658360c..862af9363d60 100644
--- a/biology/platon/files/Makefile
+++ b/biology/platon/files/Makefile
@@ -5,11 +5,11 @@
 TARGET=	platon
 OBJS=	platon.o xdrvr.o
 .if ${OSVERSION} >= 400018
-FOPT=
+FOPT=	${FFLAGS}
 .else
-FOPT=	-Nx800 -NL400 -Nn802
+FOPT=	${FFLAGS} -Nx800 -NL400 -Nn802
 .endif
-COPT=	-I%%X11BASE%%/include
+COPT=	${CFLAGS} -I%%X11BASE%%/include
 LOPT=	-L%%X11BASE%%/lib -lX11
 .if defined(HAVE_G2C)
 LOPT+=	-lg2c