diff --git a/src/core/ddsi/src/ddsi_udp.c b/src/core/ddsi/src/ddsi_udp.c
index a228097..0ab4489 100644
--- a/src/core/ddsi/src/ddsi_udp.c
+++ b/src/core/ddsi/src/ddsi_udp.c
@@ -167,7 +167,7 @@ static ssize_t ddsi_udp_conn_write (ddsi_tran_conn_t conn, const nn_locator_t *d
            rc != DDS_RETCODE_NOT_ALLOWED &&
            rc != DDS_RETCODE_NO_CONNECTION)
   {
-    DDS_ERROR("ddsi_udp_conn_write failed with retcode %d", rc);
+    DDS_ERROR("ddsi_udp_conn_write failed with retcode %d\n", rc);
   }
   return (rc == DDS_RETCODE_OK ? ret : -1);
 }
diff --git a/src/ddsrt/src/sockets/posix/socket.c b/src/ddsrt/src/sockets/posix/socket.c
index 35b80d8..94b7f89 100644
--- a/src/ddsrt/src/sockets/posix/socket.c
+++ b/src/ddsrt/src/sockets/posix/socket.c
@@ -455,6 +455,9 @@ send_error_to_retcode(int errnum)
     case ENOBUFS:
     case ENOMEM:
       return DDS_RETCODE_OUT_OF_RESOURCES;
+    case EHOSTUNREACH:
+    case EHOSTDOWN:
+      return DDS_RETCODE_NO_CONNECTION;
     default:
       break;
   }