--- configure.ac	2013-02-06 09:42:37.000000000 +1100
+++ configure_.ac	2013-12-11 14:49:49.795932100 +1100
@@ -258,7 +258,8 @@
 CFLAGS="$realsave_CFLAGS"
 
 AC_SUBST([WARN_CFLAGS], ["$tested_warning_flags"])
-AC_SUBST([DEPRECATED_CPPFLAGS], ["-DG_DISABLE_SINGLE_INCLUDES -DGTK_DISABLE_SINGLE_INCLUDES -DG_DISABLE_DEPRECATED -DGDK_DISABLE_DEPRECATED -DGTK_DISABLE_DEPRECATED -DGSEAL_ENABLE"])
+AS_IF([test "x$with_gtk3" != "xyes"],
+	[AC_SUBST([DEPRECATED_CPPFLAGS], ["-DG_DISABLE_SINGLE_INCLUDES -DGTK_DISABLE_SINGLE_INCLUDES -DG_DISABLE_DEPRECATED -DGDK_DISABLE_DEPRECATED -DGTK_DISABLE_DEPRECATED -DGSEAL_ENABLE"])])
 
 dnl To enable 'gprof' profiling
 dnl CFLAGS="$CFLAGS -pg"