diff --git a/fast-classifier/fast-classifier.h b/fast-classifier/fast-classifier.h
index d9bb95a..759c1d5 100644
--- a/fast-classifier/fast-classifier.h
+++ b/fast-classifier/fast-classifier.h
@@ -5,3 +5,5 @@
 void fast_classifier_ipv4_offload(unsigned char proto, unsigned long src_saddr,
 					 unsigned long dst_saddr, unsigned short sport,
 					 unsigned short dport);
+
+void fast_classifier_listen_for_messages(void);