--- configure.ac.orig	2014-02-15 03:33:32.000000000 -0500
+++ configure.ac	2014-11-23 22:05:59.000000000 -0500
@@ -769,6 +796,8 @@
 
 AM_CONDITIONAL([HAVE_COREAUDIO], [test "x$HAVE_COREAUDIO" = "x1" && test "x$enable_coreaudio_output" != "xno"])
 
+AC_SUBST(HAVE_COREAUDIO)
+
 #### ALSA support (optional) ####
 
 AC_ARG_ENABLE([alsa],