diff --git a/math/spar/Makefile b/math/spar/Makefile
index a20b9c3fc6a2..c84a85d70f57 100644
--- a/math/spar/Makefile
+++ b/math/spar/Makefile
@@ -3,18 +3,21 @@
 
 PORTNAME=	spar
 PORTVERSION=	0.5.10
-PORTREVISION=	5
+PORTREVISION=	6
 CATEGORIES=	math devel
 MASTER_SITES=	SF/${PORTNAME}/Spar/${PORTVERSION}
 
 MAINTAINER=	ports@FreeBSD.org
 COMMENT=	Modular math parser
 
+LICENSE=        GPLv2
+LICENSE_FILE=   ${WRKSRC}/COPYING
+
 USES=		dos2unix libtool ncurses readline
 DOS2UNIX_FILES=	lib/randist/rand.c
-GNU_CONFIGURE=	yes
 USE_CSTD=	gnu89
 USE_LDCONFIG=	yes
+GNU_CONFIGURE=	yes
 
 post-patch:
 	@${REINPLACE_CMD} -e "s,-ldl,,g" \
diff --git a/math/spar/files/patch-lib_sl__version.h b/math/spar/files/patch-lib_sl__version.h
new file mode 100644
index 000000000000..6676f4d12c2b
--- /dev/null
+++ b/math/spar/files/patch-lib_sl__version.h
@@ -0,0 +1,15 @@
+--- lib/sl_version.h.orig	2001-06-26 13:22:43 UTC
++++ lib/sl_version.h
+@@ -39,9 +39,9 @@ void sl_info (void);
+ 
+ void sl_warranty (void);
+ 
+-int sl_major_version;
+-int sl_minor_version;
+-int sl_patch_level;
++extern int sl_major_version;
++extern int sl_minor_version;
++extern int sl_patch_level;
+ 
+ __END_DECLS
+ #endif /* _sl_version_h */