diff --git a/services/cache/infra.c b/services/cache/infra.c
index d11e59c9a..11ab4e0b2 100644
--- a/services/cache/infra.c
+++ b/services/cache/infra.c
@@ -167,6 +167,7 @@ infra_lookup_host(struct infra_cache* infra,
 
 /** 
  * Create and init a new entry for a host 
+ * @param infra: infra structure with config parameters.
  * @param addr: host address.
  * @param addrlen: length of addr.
  * @param tm: time now.