diff --git a/src/vendor/inc/c_amqp_management.pxd b/src/vendor/inc/c_amqp_management.pxd
index bbc41a36..cc5b3900 100644
--- a/src/vendor/inc/c_amqp_management.pxd
+++ b/src/vendor/inc/c_amqp_management.pxd
@@ -15,13 +15,13 @@ cimport c_async_operation
 cdef extern from "azure_uamqp_c/amqp_management.h":
 
     cdef enum AMQP_MANAGEMENT_EXECUTE_OPERATION_RESULT_TAG:
-        AMQP_MANAGEMENT_EXECUTE_OPERATION_OK,
+        AMQP_MANAGEMENT_EXECUTE_OPERATION_OK = 1,   # because C code uses `MU_DEFINE_ENUM`
         AMQP_MANAGEMENT_EXECUTE_OPERATION_ERROR,
         AMQP_MANAGEMENT_EXECUTE_OPERATION_FAILED_BAD_STATUS,
         AMQP_MANAGEMENT_EXECUTE_OPERATION_INSTANCE_CLOSED
 
     cdef enum AMQP_MANAGEMENT_OPEN_RESULT_TAG:
-        AMQP_MANAGEMENT_OPEN_OK,
+        AMQP_MANAGEMENT_OPEN_OK = 1,    # because C code uses `MU_DEFINE_ENUM`
         AMQP_MANAGEMENT_OPEN_ERROR,
         AMQP_MANAGEMENT_OPEN_CANCELLED
 
diff --git a/src/vendor/inc/c_amqpvalue.pxd b/src/vendor/inc/c_amqpvalue.pxd
index 217105e3..22e4c8e7 100644
--- a/src/vendor/inc/c_amqpvalue.pxd
+++ b/src/vendor/inc/c_amqpvalue.pxd
@@ -15,7 +15,7 @@ cdef extern from "azure_uamqp_c/amqpvalue_to_string.h":
 cdef extern from "azure_uamqp_c/amqp_types.h":
 
     cdef enum AMQP_TYPE_TAG:
-        AMQP_TYPE_NULL,
+        AMQP_TYPE_NULL = 1,  # because C code uses `MU_DEFINE_ENUM`
         AMQP_TYPE_BOOL,
         AMQP_TYPE_UBYTE,
         AMQP_TYPE_USHORT,
diff --git a/src/vendor/inc/c_cbs.pxd b/src/vendor/inc/c_cbs.pxd
index fea044c3..4f0651ae 100644
--- a/src/vendor/inc/c_cbs.pxd
+++ b/src/vendor/inc/c_cbs.pxd
@@ -25,13 +25,13 @@ cdef enum AUTH_STATUS:
 cdef extern from "azure_uamqp_c/cbs.h":
 
     cdef enum CBS_OPERATION_RESULT_TAG:
-        CBS_OPERATION_RESULT_OK,
+        CBS_OPERATION_RESULT_OK = 1,    # because C code uses `MU_DEFINE_ENUM`
         CBS_OPERATION_RESULT_CBS_ERROR,
         CBS_OPERATION_RESULT_OPERATION_FAILED,
         CBS_OPERATION_RESULT_INSTANCE_CLOSED
 
     cdef enum CBS_OPEN_COMPLETE_RESULT_TAG:
-        CBS_OPEN_OK,
+        CBS_OPEN_OK = 1,    # because C code uses `MU_DEFINE_ENUM`
         CBS_OPEN_ERROR,
         CBS_OPEN_CANCELLED
 
diff --git a/src/vendor/inc/c_connection.pxd b/src/vendor/inc/c_connection.pxd
index 7f03130f..c95490df 100644
--- a/src/vendor/inc/c_connection.pxd
+++ b/src/vendor/inc/c_connection.pxd
@@ -20,7 +20,7 @@ cdef extern from "azure_uamqp_c/connection.h":
         pass
 
     cdef enum CONNECTION_STATE_TAG:
-        CONNECTION_STATE_START,
+        CONNECTION_STATE_START = 0,     # because C code uses `typedef enum`
         CONNECTION_STATE_HDR_RCVD,
         CONNECTION_STATE_HDR_SENT,
         CONNECTION_STATE_HDR_EXCH,
diff --git a/src/vendor/inc/c_link.pxd b/src/vendor/inc/c_link.pxd
index 17586015..794cfe98 100644
--- a/src/vendor/inc/c_link.pxd
+++ b/src/vendor/inc/c_link.pxd
@@ -20,18 +20,18 @@ cdef extern from "azure_uamqp_c/link.h":
         pass
 
     cdef enum LINK_STATE_TAG:
-        LINK_STATE_DETACHED,
+        LINK_STATE_DETACHED = 1,    # because C code uses `MU_DEFINE_ENUM`
         LINK_STATE_HALF_ATTACHED_ATTACH_SENT,
         LINK_STATE_HALF_ATTACHED_ATTACH_RECEIVED,
         LINK_STATE_ATTACHED,
         LINK_STATE_ERROR
 
     cdef enum LINK_TRANSFER_RESULT_TAG:
-        LINK_TRANSFER_ERROR,
+        LINK_TRANSFER_ERROR = 1,    # because C code uses `MU_DEFINE_ENUM`
         LINK_TRANSFER_BUSY
 
     cdef enum LINK_DELIVERY_SETTLE_REASON_TAG:
-        LINK_DELIVERY_SETTLE_REASON_DISPOSITION_RECEIVED,
+        LINK_DELIVERY_SETTLE_REASON_DISPOSITION_RECEIVED = 1, # because C code uses `MU_DEFINE_ENUM`
         LINK_DELIVERY_SETTLE_REASON_SETTLED,
         LINK_DELIVERY_SETTLE_REASON_NOT_DELIVERED,
         LINK_DELIVERY_SETTLE_REASON_TIMEOUT,
diff --git a/src/vendor/inc/c_message.pxd b/src/vendor/inc/c_message.pxd
index 48614cae..9aa25967 100644
--- a/src/vendor/inc/c_message.pxd
+++ b/src/vendor/inc/c_message.pxd
@@ -25,7 +25,7 @@ cdef extern from "azure_uamqp_c/messaging.h":
 cdef extern from "azure_uamqp_c/message.h":
 
     cdef enum MESSAGE_BODY_TYPE_TAG:
-        MESSAGE_BODY_TYPE_NONE,
+        MESSAGE_BODY_TYPE_NONE = 1, # because C code uses `MU_DEFINE_ENUM`
         MESSAGE_BODY_TYPE_DATA,
         MESSAGE_BODY_TYPE_SEQUENCE,
         MESSAGE_BODY_TYPE_VALUE,
diff --git a/src/vendor/inc/c_message_receiver.pxd b/src/vendor/inc/c_message_receiver.pxd
index eee83abc..790284c3 100644
--- a/src/vendor/inc/c_message_receiver.pxd
+++ b/src/vendor/inc/c_message_receiver.pxd
@@ -12,7 +12,7 @@ cimport c_amqpvalue
 cdef extern from "azure_uamqp_c/message_receiver.h":
 
     cdef enum MESSAGE_RECEIVER_STATE_TAG:
-        MESSAGE_RECEIVER_STATE_IDLE,
+        MESSAGE_RECEIVER_STATE_IDLE = 1,    # because C code uses `MU_DEFINE_ENUM`
         MESSAGE_RECEIVER_STATE_OPENING,
         MESSAGE_RECEIVER_STATE_OPEN,
         MESSAGE_RECEIVER_STATE_CLOSING,
diff --git a/src/vendor/inc/c_message_sender.pxd b/src/vendor/inc/c_message_sender.pxd
index 5de66ca8..1a8ce72b 100644
--- a/src/vendor/inc/c_message_sender.pxd
+++ b/src/vendor/inc/c_message_sender.pxd
@@ -16,13 +16,13 @@ cimport c_amqpvalue
 cdef extern from "azure_uamqp_c/message_sender.h":
 
     cdef enum MESSAGE_SEND_RESULT_TAG:
-        MESSAGE_SEND_OK,
+        MESSAGE_SEND_OK = 1,    # because C code uses `MU_DEFINE_ENUM`
         MESSAGE_SEND_ERROR,
         MESSAGE_SEND_TIMEOUT,
         MESSAGE_SEND_CANCELLED
 
     cdef enum MESSAGE_SENDER_STATE_TAG:
-        MESSAGE_SENDER_STATE_IDLE,
+        MESSAGE_SENDER_STATE_IDLE = 1,  # because C code uses `MU_DEFINE_ENUM`
         MESSAGE_SENDER_STATE_OPENING,
         MESSAGE_SENDER_STATE_OPEN,
         MESSAGE_SENDER_STATE_CLOSING,
diff --git a/src/vendor/inc/c_platform.pxd b/src/vendor/inc/c_platform.pxd
index 61885794..d6f7d8e8 100644
--- a/src/vendor/inc/c_platform.pxd
+++ b/src/vendor/inc/c_platform.pxd
@@ -13,7 +13,7 @@ cimport c_xio
 cdef extern from "azure_c_shared_utility/platform.h":
 
     cdef enum PLATFORM_INFO_OPTION_TAG:
-        PLATFORM_INFO_OPTION_DEFAULT,
+        PLATFORM_INFO_OPTION_DEFAULT = 1,   # because C code uses `MU_DEFINE_ENUM`
         PLATFORM_INFO_OPTION_RETRIEVE_SQM,
 
     int platform_init()
diff --git a/src/vendor/inc/c_utils.pxd b/src/vendor/inc/c_utils.pxd
index c15d3cae..72ebbf0a 100644
--- a/src/vendor/inc/c_utils.pxd
+++ b/src/vendor/inc/c_utils.pxd
@@ -34,7 +34,7 @@ cdef extern from "azure_c_shared_utility/buffer_.h":
 cdef extern from "azure_c_shared_utility/map.h":
 
     cdef enum MAP_RESULT_TAG:
-        MAP_OK,
+        MAP_OK = 1, # because C code uses `MU_DEFINE_ENUM`
         MAP_ERROR,
         MAP_INVALIDARG,
         MAP_KEYEXISTS,
@@ -99,7 +99,7 @@ cdef extern from "azure_c_shared_utility/doublylinkedlist.h":
 cdef extern from "azure_c_shared_utility/optionhandler.h":
 
     cdef enum OPTIONHANDLER_RESULT_TAG:
-        OPTIONHANDLER_OK,
+        OPTIONHANDLER_OK = 0,   # because code uses MU_DEFINE_ENUM_WITHOUT_INVALID
         OPTIONHANDLER_ERROR,
         OPTIONHANDLER_INVALIDARG
 
diff --git a/src/vendor/inc/c_xio.pxd b/src/vendor/inc/c_xio.pxd
index ad3d7ba3..94c5dd4d 100644
--- a/src/vendor/inc/c_xio.pxd
+++ b/src/vendor/inc/c_xio.pxd
@@ -15,12 +15,12 @@ cdef extern from "azure_c_shared_utility/xio.h":
     ctypedef void* XIO_HANDLE
 
     cdef enum IO_SEND_RESULT_TAG:
-        IO_SEND_OK,
+        IO_SEND_OK = 1, # because C code uses `MU_DEFINE_ENUM`
         IO_SEND_ERROR,
         IO_SEND_CANCELLED
 
     cdef enum IO_OPEN_RESULT_TAG:
-        IO_OPEN_OK,
+        IO_OPEN_OK = 1, # because C code uses `MU_DEFINE_ENUM`
         IO_OPEN_ERROR,
         IO_OPEN_CANCELLED
 
diff --git a/src/vendor/inc/c_xlogging.pxd b/src/vendor/inc/c_xlogging.pxd
index e74b4da1..39c27662 100644
--- a/src/vendor/inc/c_xlogging.pxd
+++ b/src/vendor/inc/c_xlogging.pxd
@@ -7,7 +7,7 @@
 cdef extern from "azure_c_shared_utility/xlogging.h":
 
     cdef enum LOG_CATEGORY_TAG:
-        AZ_LOG_ERROR,
+        AZ_LOG_ERROR = 0, # because C code uses `typedef enum`
         AZ_LOG_INFO,
         AZ_LOG_TRACE