diff --git a/src/imap/ngx_imap.c b/src/imap/ngx_imap.c
index 13855f1..eb12b67 100644
--- a/src/imap/ngx_imap.c
+++ b/src/imap/ngx_imap.c
@@ -50,6 +50,7 @@
     }
 
     ls->backlog = -1;
+    ls->addr_ntop = 1;
     ls->handler = ngx_imap_init_connection;
     ls->pool_size = 16384;
     /* ls->post_accept_timeout = 0; */