diff --git a/configure.ac b/configure.ac
index 5d5fb1b1cbec33c0d9fbb8c73ca537915dee30f0..189958728d29cb9b7cee602753e3a5e8bc5156b5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -331,15 +331,13 @@ dnl check for libportaudio
 AS_IF([test "${SYS}" = "mingw32"],[
 AC_ARG_WITH([portaudio], [AS_HELP_STRING([--without-portaudio],
             [disable support for portaudio])], [], [with_portaudio=yes])
-
+])
 AS_IF([test "x$with_portaudio" = "xyes"],
       [PKG_CHECK_MODULES(PORTAUDIO, [portaudio-2.0],
         [AC_DEFINE([HAVE_PORTAUDIO], 1, [Define if you have portaudio])],
-        [AC_MSG_WARN([Missing libportaudio development files])
-         AC_DEFINE([HAVE_PORTAUDIO], 0, [Define if you have portaudio])
-        ])
+        [AC_MSG_ERROR([Missing libportaudio development files])])
       ])
-])
+
 AM_CONDITIONAL(BUILD_PORTAUDIO, test "x$with_portaudio" = "xyes")
 AM_CONDITIONAL(HAVE_PORTAUDIO, test "x$with_portaudio" = "xyes")