diff --git a/config.h.in b/config.h.in
index d46b3d3ffc..b5656c14e7 100644
--- a/config.h.in
+++ b/config.h.in
@@ -28,6 +28,9 @@
 /* Define to 1 if you have the `pcre' library (-lpcre). */
 #undef HAVE_LIBPCRE
 
+/* Define to 1 if you have the `pfring' library (-lpfring). */
+#undef HAVE_LIBPFRING
+
 /* Define to 1 if you have the `pthread' library (-lpthread). */
 #undef HAVE_LIBPTHREAD