diff --git a/features/netsocket/mbed_lib.json b/features/netsocket/mbed_lib.json
index 5de5a8884a..34f155fe45 100644
--- a/features/netsocket/mbed_lib.json
+++ b/features/netsocket/mbed_lib.json
@@ -6,6 +6,7 @@
         "default-wifi-ssid": null,
         "default-wifi-password": null,
         "default-wifi-security": "NONE",
+        "default-cellular-sim-pin": null,
         "default-cellular-apn": null,
         "default-cellular-username": null,
         "default-cellular-password": null,