diff --git a/features/FEATURE_BLE/targets/TARGET_CORDIO_LL/mbed_lib.json b/features/FEATURE_BLE/targets/TARGET_CORDIO_LL/mbed_lib.json
index 170246d299..50d6c4b1f7 100644
--- a/features/FEATURE_BLE/targets/TARGET_CORDIO_LL/mbed_lib.json
+++ b/features/FEATURE_BLE/targets/TARGET_CORDIO_LL/mbed_lib.json
@@ -30,8 +30,8 @@
             "value": 0
         },
         "extended-advertising-size": {
-            "help": "Maximum extended advertising data (and scan data response) size",
-            "value": 128
+            "help": "Maximum extended advertising data (and scan data response) size, Minimum value is 251",
+            "value": 251
         },
         "max-acl-size": {
             "help": "Maximum ACL buffer size",