diff --git a/graphics/inventor/Makefile b/graphics/inventor/Makefile
index b6727edff14f..f7ccd2c63d4a 100644
--- a/graphics/inventor/Makefile
+++ b/graphics/inventor/Makefile
@@ -7,7 +7,7 @@
 
 PORTNAME=	inventor
 PORTVERSION=	2.1.5.p10
-PORTREVISION=	1
+PORTREVISION=	2
 CATEGORIES=	graphics
 MASTER_SITES=	ftp://oss.sgi.com/projects/inventor/download/
 DISTNAME=	${PORTNAME}-${PORTVERSION:S/.p/-/}
diff --git a/graphics/inventor/files/patch-open.c b/graphics/inventor/files/patch-open.c
new file mode 100644
index 000000000000..a9a735a84e55
--- /dev/null
+++ b/graphics/inventor/files/patch-open.c
@@ -0,0 +1,29 @@
+--- libimage/open.c.orig	Sat Oct 14 12:46:09 2000
++++ libimage/open.c	Sat Mar 24 20:27:50 2007
+@@ -8,6 +8,17 @@
+ #include	<stdlib.h>
+ #include	"image.h"
+ 
++#ifdef __FreeBSD__
++	#include <machine/endian.h>
++	#if BYTE_ORDER == LITTLE_ENDIAN
++		#define DOREV	1
++	#else
++		#define DOREV	0
++	#endif
++#else
++	#define DOREV	0
++#endif
++
+ void cvtlongs(int buffer[],int n);
+ void cvtimage(int buffer[]);
+ void i_seterror(void (*func)());
+@@ -80,7 +91,7 @@
+ 		image->max = 0;
+ 		isetname(image,"no name"); 
+ 		image->wastebytes = 0;
+-		image->dorev = 0;
++		image->dorev = DOREV;
+ 		if (write(f,image,sizeof(IMAGE)) != sizeof(IMAGE)) {
+ 		    free(image);
+ 		    close(f);