diff --git a/src/amqp_frame.h b/src/amqp_frame.h
index bc5c516..4940054 100644
--- a/src/amqp_frame.h
+++ b/src/amqp_frame.h
@@ -8,14 +8,14 @@
 #include "amqp_global.h"
 
 #define AMQP_BASIC_CONTENT_TYPE_FLAG (1 << 15)
-#define AMQP_BASIC_CONTENT_ENCODING_FLAG (1 << 7)
+#define AMQP_BASIC_CONTENT_ENCODING_FLAG (1 << 14)
 #define AMQP_BASIC_HEADERS_FLAG (1 << 13)
 #define AMQP_BASIC_DELIVERY_MODE_FLAG (1 << 12)
 #define AMQP_BASIC_PRIORITY_FLAG (1 << 11)
 #define AMQP_BASIC_CORRELATION_ID_FLAG (1 << 10)
 #define AMQP_BASIC_REPLY_TO_FLAG (1 << 9)
 #define AMQP_BASIC_EXPIRATION_FLAG (1 << 8)
-#define AMQP_BASIC_MESSAGE_ID_FLAG (1 << 14)
+#define AMQP_BASIC_MESSAGE_ID_FLAG (1 << 7)
 #define AMQP_BASIC_TIMESTAMP_FLAG (1 << 6)
 #define AMQP_BASIC_TYPE_FLAG (1 << 5)
 #define AMQP_BASIC_USER_ID_FLAG (1 << 4)