diff --git a/sdk/inc/azure/iot/az_iot_adu_client.h b/sdk/inc/azure/iot/az_iot_adu_client.h
index 9a8a815495..8b03718ba2 100644
--- a/sdk/inc/azure/iot/az_iot_adu_client.h
+++ b/sdk/inc/azure/iot/az_iot_adu_client.h
@@ -30,9 +30,9 @@
 #include <azure/core/_az_cfg_prefix.h>
 
 /**
- * @brief  Define the ADU agent interface ID.
+ * @brief  Define the ADU agent model ID.
  */
-#define AZ_IOT_ADU_CLIENT_AGENT_INTERFACE_ID "dtmi:azure:iot:deviceUpdateModel;1"
+#define AZ_IOT_ADU_CLIENT_AGENT_MODEL_ID "dtmi:azure:iot:deviceUpdateModel;1"
 
 /**
  * @brief ADU Agent Version
diff --git a/sdk/src/azure/iot/az_iot_adu_client.c b/sdk/src/azure/iot/az_iot_adu_client.c
index b52c4d2cbe..d2d904dcb5 100644
--- a/sdk/src/azure/iot/az_iot_adu_client.c
+++ b/sdk/src/azure/iot/az_iot_adu_client.c
@@ -12,6 +12,8 @@
 /* Define the ADU agent component name.  */
 #define AZ_IOT_ADU_CLIENT_AGENT_COMPONENT_NAME "deviceUpdate"
 
+#define AZ_IOT_ADU_CLIENT_AGENT_INTERFACE_ID "dtmi:azure:iot:deviceUpdate;1"
+
 /* Define the ADU agent property name "agent" and sub property names.  */
 #define AZ_IOT_ADU_CLIENT_AGENT_PROPERTY_NAME_AGENT "agent"
 
diff --git a/sdk/tests/iot/adu/test_az_iot_adu.c b/sdk/tests/iot/adu/test_az_iot_adu.c
index 58af5619a7..d2231719d7 100644
--- a/sdk/tests/iot/adu/test_az_iot_adu.c
+++ b/sdk/tests/iot/adu/test_az_iot_adu.c
@@ -29,14 +29,14 @@
 
 static uint8_t expected_agent_state_payload[]
     = "{\"deviceUpdate\":{\"__t\":\"c\",\"agent\":{\"deviceProperties\":{\"manufacturer\":"
-      "\"Contoso\",\"model\":\"Foobar\",\"interfaceId\":\"dtmi:azure:iot:deviceUpdateModel;1\","
+      "\"Contoso\",\"model\":\"Foobar\",\"interfaceId\":\"dtmi:azure:iot:deviceUpdate;1\","
       "\"aduVer\":\"DU;agent/"
       "0.8.0-rc1-public-preview\"},\"compatPropertyNames\":\"manufacturer,model\",\"state\":0,"
       "\"installedUpdateId\":\"{\\\"provider\\\":\\\"Contoso\\\",\\\"name\\\":\\\"Foobar\\\","
       "\\\"version\\\":\\\"1.0\\\"}\"}}}";
 static uint8_t expected_agent_state_long_payload[]
     = "{\"deviceUpdate\":{\"__t\":\"c\",\"agent\":{\"deviceProperties\":{\"manufacturer\":"
-      "\"Contoso\",\"model\":\"Foobar\",\"interfaceId\":\"dtmi:azure:iot:deviceUpdateModel;1\","
+      "\"Contoso\",\"model\":\"Foobar\",\"interfaceId\":\"dtmi:azure:iot:deviceUpdate;1\","
       "\"aduVer\":\"DU;agent/"
       "0.8.0-rc1-public-preview\"},\"compatPropertyNames\":\"manufacturer,model\","
       "\"lastInstallResult\":{\"resultCode\":0,\"extendedResultCode\":1234,\"resultDetails\":"