diff --git a/ballerina/constants.bal b/ballerina/constants.bal
index 5e82482..1142b66 100644
--- a/ballerina/constants.bal
+++ b/ballerina/constants.bal
@@ -125,6 +125,9 @@ public const int ENC_FLOAT_IEEE_REVERSED = 512;
 # Floating-point numbers are represented using the standard zSeries (System/390) floating-point format.
 public const int ENC_FLOAT_S390 = 768;
 
+# Character data in the message is in the queue manager's character set.
+public const int CCSI_Q_MGR = 0;
+
 # ASCII character set
 public const int CHARSET_ASCII = 850;
 
diff --git a/ballerina/types.bal b/ballerina/types.bal
index eb7e5ea..e14c4f5 100644
--- a/ballerina/types.bal
+++ b/ballerina/types.bal
@@ -23,7 +23,7 @@ public type OPEN_TOPIC_OPTION OPEN_AS_SUBSCRIPTION|OPEN_AS_PUBLICATION;
 public type Header MQRFH2|MQRFH|MQCIH|MQIIH;
 
 # The coded character set used in application message data.
-public type MESSAGE_CHARSET CHARSET_ASCII|CHARSET_ASCII_ISO|CHARSET_EBCDIC|CHARSET_UNICODE|CHARSET_UTF8;
+public type MESSAGE_CHARSET CCSI_Q_MGR|CHARSET_ASCII|CHARSET_ASCII_ISO|CHARSET_EBCDIC|CHARSET_UNICODE|CHARSET_UTF8;
 
 # The SSL Cipher Suite to be used for secure communication with the IBM MQ server.
 public type SslCipherSuite SSL_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA|SSL_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256