diff --git a/src/iec61850/inc/iec61850_client.h b/src/iec61850/inc/iec61850_client.h
index 0cecd640..c033dea0 100644
--- a/src/iec61850/inc/iec61850_client.h
+++ b/src/iec61850/inc/iec61850_client.h
@@ -1823,6 +1823,8 @@ IedConnection_getDataDirectoryByFC(IedConnection self, IedClientError* error, co
  * This function can be used to get the MMS variable type specification for an IEC 61850 data attribute. It is an extension
  * of the ACSI that may be required by generic client applications.
  *
+ * NOTE: API user is responsible to free the resources (see \ref MmsVariableSpecification_destroy)
+ *
  * \param self the connection object
  * \param error the error code if an error occurs
  * \param dataAttributeReference string that represents the DA reference
diff --git a/src/iec61850/inc/iec61850_server.h b/src/iec61850/inc/iec61850_server.h
index 5a5c66d1..8fdd91ee 100644
--- a/src/iec61850/inc/iec61850_server.h
+++ b/src/iec61850/inc/iec61850_server.h
@@ -856,6 +856,8 @@ typedef enum {
  * a control operation has been invoked by the client. This callback function is
  * intended to perform the static tests. It should check if the interlock conditions
  * are met if the interlockCheck parameter is true.
+ * This handler can also be check if the client has the required permissions to execute the
+ * operation and allow or deny the operation accordingly.
  *
  * \param parameter the parameter that was specified when setting the control handler
  * \param ctlVal the control value of the control operation.
diff --git a/src/mms/inc/mms_common.h b/src/mms/inc/mms_common.h
index 59d172b4..ed5a8836 100644
--- a/src/mms/inc/mms_common.h
+++ b/src/mms/inc/mms_common.h
@@ -102,7 +102,7 @@ typedef enum
 
 } MmsError;
 
-typedef enum ATTRIBUTE_PACKED
+typedef enum
 {
     /*! this represents all MMS array types (arrays contain uniform elements) */
     MMS_ARRAY = 0,
diff --git a/src/mms/inc/mms_types.h b/src/mms/inc/mms_types.h
index 61fdab48..b2689620 100644
--- a/src/mms/inc/mms_types.h
+++ b/src/mms/inc/mms_types.h
@@ -26,7 +26,7 @@
 
 #include "libiec61850_common_api.h"
 
-typedef enum ATTRIBUTE_PACKED {
+typedef enum  {
     MMS_VALUE_NO_RESPONSE,
 	MMS_VALUE_OK,
 	MMS_VALUE_ACCESS_DENIED,