diff --git a/examples/Azure_IoT_Central_ESP32/AzureIoT.h b/examples/Azure_IoT_Central_ESP32/AzureIoT.h
index 4cf52218..84795bd9 100644
--- a/examples/Azure_IoT_Central_ESP32/AzureIoT.h
+++ b/examples/Azure_IoT_Central_ESP32/AzureIoT.h
@@ -499,7 +499,7 @@ typedef struct azure_iot_config_t_struct
    *              Where:
    *              <MQTT-clientid>  = <device-id> + '\0'
    *              <MQTT-username>  = <iot-hub-fqdn> + '/' + lengthof(<device-id>) + '/' + '?' + <api-version> +
-   *                                 "&dct=" + urlenc(<user-agent>) + "&model-id=" + urlenc(<pnp-model-id>) + '\0'
+   *                                 "&DeviceClientType=" + urlenc(<user-agent>) + "&model-id=" + urlenc(<pnp-model-id>) + '\0'
    *              <api-version>    = "api-version=<YYYY-MM-DD>" 
    *              <MQTT-password>) = "SharedAccessSignature sr=" + <iot-hub-fqdn> + "%2Fdevices%2F" + <device-id> +
    *                                 "&sig=" + urlenc(<sha256-string>) + "&se=" + <expiration-time> + '\0'
diff --git a/examples/Azure_IoT_Central_ESP32_AzureIoTKit/AzureIoT.h b/examples/Azure_IoT_Central_ESP32_AzureIoTKit/AzureIoT.h
index 4cf52218..84795bd9 100644
--- a/examples/Azure_IoT_Central_ESP32_AzureIoTKit/AzureIoT.h
+++ b/examples/Azure_IoT_Central_ESP32_AzureIoTKit/AzureIoT.h
@@ -499,7 +499,7 @@ typedef struct azure_iot_config_t_struct
    *              Where:
    *              <MQTT-clientid>  = <device-id> + '\0'
    *              <MQTT-username>  = <iot-hub-fqdn> + '/' + lengthof(<device-id>) + '/' + '?' + <api-version> +
-   *                                 "&dct=" + urlenc(<user-agent>) + "&model-id=" + urlenc(<pnp-model-id>) + '\0'
+   *                                 "&DeviceClientType=" + urlenc(<user-agent>) + "&model-id=" + urlenc(<pnp-model-id>) + '\0'
    *              <api-version>    = "api-version=<YYYY-MM-DD>" 
    *              <MQTT-password>) = "SharedAccessSignature sr=" + <iot-hub-fqdn> + "%2Fdevices%2F" + <device-id> +
    *                                 "&sig=" + urlenc(<sha256-string>) + "&se=" + <expiration-time> + '\0'
diff --git a/examples/Azure_IoT_Central_ESP32_AzureIoTKit/Azure_IoT_Central_ESP32_AzureIoTKit.ino b/examples/Azure_IoT_Central_ESP32_AzureIoTKit/Azure_IoT_Central_ESP32_AzureIoTKit.ino
index b77bc615..ea1a7b54 100644
--- a/examples/Azure_IoT_Central_ESP32_AzureIoTKit/Azure_IoT_Central_ESP32_AzureIoTKit.ino
+++ b/examples/Azure_IoT_Central_ESP32_AzureIoTKit/Azure_IoT_Central_ESP32_AzureIoTKit.ino
@@ -85,7 +85,7 @@ static const char* wifi_ssid = IOT_CONFIG_WIFI_SSID;
 static const char* wifi_password = IOT_CONFIG_WIFI_PASSWORD;
 
 // TODO: remove this after updating library with Azure SDK for C version 1.3.0-beta.2 or later.
-#define AZURE_SDK_CLIENT_USER_AGENT_WORKAROUND "dct=" AZURE_SDK_CLIENT_USER_AGENT
+#define AZURE_SDK_CLIENT_USER_AGENT_WORKAROUND "DeviceClientType=" AZURE_SDK_CLIENT_USER_AGENT
 
 /* --- Function Declarations --- */
 static void sync_device_clock_with_ntp_server();