diff --git a/cad/scotch/Makefile b/cad/scotch/Makefile
index 9fb933476d7d7..94b8604113054 100644
--- a/cad/scotch/Makefile
+++ b/cad/scotch/Makefile
@@ -1,6 +1,6 @@
 PORTNAME=	scotch
 DISTVERSION=	6.0.4-aster7
-PORTREVISION=	4
+PORTREVISION=	5
 CATEGORIES=	cad science
 
 MAINTAINER=	thierry@FreeBSD.org
diff --git a/cad/scotch/files/patch-src_libscotch_library.h b/cad/scotch/files/patch-src_libscotch_library.h
new file mode 100644
index 0000000000000..9af926eebfad3
--- /dev/null
+++ b/cad/scotch/files/patch-src_libscotch_library.h
@@ -0,0 +1,16 @@
+- workaround for:
+- - https://gitlab.inria.fr/scotch/scotch/-/issues/35
+- - https://github.com/FreeFem/FreeFem-sources/issues/296
+
+--- src/libscotch/library.h.orig	2017-02-22 07:20:57 UTC
++++ src/libscotch/library.h
+@@ -61,6 +61,9 @@
+ #ifndef SCOTCH_H
+ #define SCOTCH_H
+ 
++#include <sys/types.h>
++#include <stdio.h>
++
+ /*
+ **  The type and structure definitions.
+ */