+AC_CHECK_HEADERS([iphbd/libiphb.h], have_libiphb=true, have_libiphb=false)
+
+if test "x$have_libiphb" == "xtrue"; then
+ AC_DEFINE_UNQUOTED(MODEST_USE_IPHB, 1, ["use IP Heartbeat API"])
+ MODEST_LIBIPHB_LIBS=-liphb
+else
+ MODEST_LIBIPHB_LIBS=
+fi
+AC_SUBST(MODEST_LIBIPHB_LIBS)
+