Index: configure.ac
===================================================================
--- configure.ac	(revision 231299)
+++ configure.ac	(working copy)
@@ -268,6 +268,7 @@
 AST_EXT_LIB_SETUP_DEPENDENT([PRI_REVERSE_CHARGE], [ISDN reverse charge], [PRI], [pri])
 AST_EXT_LIB_SETUP([RESAMPLE], [LIBRESAMPLE], [resample])
 AST_EXT_LIB_SETUP([SPANDSP], [SPANDSP], [spandsp])
+AST_EXT_LIB_SETUP_DEPENDENT([SPANDSP_EXPOSE_H], [spandsp expose.h header], [SPANDSP], [spandsp])
 AST_EXT_LIB_SETUP([SS7], [ISDN SS7], [ss7])
 AST_EXT_LIB_SETUP([PWLIB], [PWlib], [pwlib])
 AST_EXT_LIB_SETUP([OPENH323], [OpenH323], [h323])
@@ -1342,7 +1343,7 @@
 fi
 
 if test "x${PBX_SPANDSP}" = "x1" ; then
-	AC_CHECK_HEADER([spandsp/expose.h], [AC_DEFINE_UNQUOTED([HAVE_SPANDSP_EXPOSE_H], 1, [Define to 1 if spandsp/expose.h is available.])], [], [#include <spandsp.h>])
+	AST_EXT_LIB_CHECK([SPANDSP_EXPOSE_H], [spandsp], [], [spandsp/expose.h])
 fi
 
 AST_EXT_LIB_CHECK([SS7], [ss7], [ss7_pollflags], [libss7.h])