--- debian/rules.orig	2015-07-02 13:30:12.900600437 +1000
+++ debian/rules	2015-07-02 13:28:35.092408543 +1000
@@ -10,7 +10,7 @@
 	install RPM_BUILD_ROOT=$(DEB_DESTDIR) NLSDIR=$(DEB_DESTDIR)usr/share/locale

 DEB_CONFIGURE_EXTRA_FLAGS := \
-	--datadir=\$${prefix}/share/fhist --libdir=\$${prefix}/share/fhist
+	CFLAGS="-std=c89" --datadir=\$${prefix}/share/fhist --libdir=\$${prefix}/share/fhist

 install/fhist::
 	mv \