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--- a/src/config.h.in
+++ b/src/config.h.in
@@ -11,6 +11,9 @@
 
 /* Define to 1 if you have the `rtmp' library (-lrtmp). */
 #undef HAVE_LIBRTMP
+
+/* Define to 1 if you have the `upnp' library (-lupnp). */
+#undef HAVE_LIBUPNP
 
 /* Define to 1 if you have the `upnpp' library (-lupnpp). */
 #undef HAVE_LIBUPNPP