diff --git a/math/gri/Makefile b/math/gri/Makefile
index b3b4b1a0215f..bcf706ae43be 100644
--- a/math/gri/Makefile
+++ b/math/gri/Makefile
@@ -12,7 +12,7 @@ COMMENT=	Extensible plotting language for producing scientific graphs
 
 LIB_DEPENDS=	libnetcdf.so:${PORTSDIR}/science/netcdf
 
-USES=		gmake readline shebangfix
+USES=		gmake readline shebangfix makeinfo
 SHEBANG_FILES=	src/gri_merge src/gri_unpage
 GNU_CONFIGURE=	yes
 CONFIGURE_ARGS=	--enable-FreeBSD
@@ -21,6 +21,7 @@ CPPFLAGS+=	-I${LOCALBASE}/include
 LDFLAGS+=	-L${LOCALBASE}/lib
 
 INFO=		gri
+USE_TEX=	formats
 PORTDOCS=	*
 PORTEXAMPLES=	*
 PLIST_FILES=	bin/gri bin/gri_merge bin/gri_unpage \