diff --git a/zaf_ecode.h b/zaf_ecode.h
index c9dde70..ff0b434 100644
--- a/zaf_ecode.h
+++ b/zaf_ecode.h
@@ -9,4 +9,5 @@ typedef enum {
   kaf_ec_setsockopt_rx_timeout_fail = 6,
   kaf_ec_lose_connect               = 7,
   kaf_ec_param_error                = 8,
+  kaf_ec_device_notopen             = 9,
 } zaf_error_code_t;