diff --git a/math/octave-forge-octproj/Makefile b/math/octave-forge-octproj/Makefile
index aec52b5f5d78..29bd722d88d0 100644
--- a/math/octave-forge-octproj/Makefile
+++ b/math/octave-forge-octproj/Makefile
@@ -2,7 +2,7 @@
 
 PORTNAME=	octave-forge-octproj
 PORTVERSION=	2.0.1
-PORTREVISION=	4
+PORTREVISION=	5
 CATEGORIES=	math
 
 MAINTAINER=	stephen@FreeBSD.org
diff --git a/math/octave-forge-octproj/files/patch-projwrap.h b/math/octave-forge-octproj/files/patch-projwrap.h
new file mode 100644
index 000000000000..c56dc1f24c25
--- /dev/null
+++ b/math/octave-forge-octproj/files/patch-projwrap.h
@@ -0,0 +1,10 @@
+--- projwrap.h.orig	2020-05-07 16:41:54 UTC
++++ projwrap.h
+@@ -24,6 +24,7 @@ or http://www.gnu.org
+ #include<stdio.h>
+ #include<stdlib.h>
+ #include<math.h>
++#undef ACCEPT_USE_OF_DEPRECATED_PROJ_API_H
+ #include<proj.h>
+ /******************************************************************************/
+ /******************************************************************************/