diff --git a/lib/utils_tcp.h b/lib/utils_tcp.h
index d5999e9b..a7d83c59 100644
--- a/lib/utils_tcp.h
+++ b/lib/utils_tcp.h
@@ -11,6 +11,7 @@
  * server.
  */
 enum np_match_result {
+	NP_MATCH_NONE,
 	NP_MATCH_FAILURE,
 	NP_MATCH_SUCCESS,
 	NP_MATCH_RETRY