--- databases/pgsphere/Makefile	
+++ databases/pgsphere/Makefile	
@@ -19,7 +19,8 @@ 
 USE_LDCONFIG=	yes
 MAKE_ARGS=	PG_CONFIG=${LOCALBASE}/bin/pg_config USE_PGXS=1 \
 		docdir=${DOCSDIR} \
-		install_bin=/usr/bin/install
+		install_bin=/usr/bin/install \
+		CFLAGS="${CFLAGS} -Wvla"
 TEST_TARGET=	installcheck
 
 DATADIR=	${PREFIX}/share/postgresql