diff --git a/wireless/wapi/src/wapi.c b/wireless/wapi/src/wapi.c
index 5aca9859e..3016f52af 100644
--- a/wireless/wapi/src/wapi.c
+++ b/wireless/wapi/src/wapi.c
@@ -591,7 +591,7 @@ static int wapi_psk_cmd(int sock, int argc, FAR char **argv)
         break;
 
       default:
-        return -1;
+        return -EINVAL;
     }
 
   ret = wpa_driver_wext_set_auth_param(sock, argv[0],