diff --git src/libcmis/ws-soap.cxx src/libcmis/ws-soap.cxx
index e8efd67..decb79a 100644
--- src/libcmis/ws-soap.cxx
+++ src/libcmis/ws-soap.cxx
@@ -279,7 +279,7 @@ string SoapRequest::createEnvelope( string& username, string& password )
     boost::posix_time::ptime expires( created );
     expires = expires + boost::gregorian::days( 1 );
     string createdStr = libcmis::writeDateTime( created );
-    xmlChar* expiresStr = BAD_CAST( libcmis::writeDateTime( expires ).c_str( ) );
+    string expiresStr = libcmis::writeDateTime( expires );
 
     xmlTextWriterStartElement( writer, BAD_CAST( "S:Envelope" ) );
     xmlTextWriterWriteAttribute( writer, BAD_CAST( "xmlns:S" ), BAD_CAST( NS_SOAP_ENV_URL ) );
@@ -296,7 +296,7 @@ string SoapRequest::createEnvelope( string& username, string& password )
     xmlTextWriterWriteRaw( writer, BAD_CAST( createdStr.c_str( ) ) );
     xmlTextWriterEndElement( writer ); // End of Created
     xmlTextWriterStartElement( writer, BAD_CAST( "wsse:Expires" ) );
-    xmlTextWriterWriteRaw( writer, expiresStr );
+    xmlTextWriterWriteRaw( writer, BAD_CAST( expiresStr.c_str() ) );
     xmlTextWriterEndElement( writer ); // End of Expires
     xmlTextWriterEndElement( writer ); // End of Timestamp
 
diff --git src/libcmis/document.cxx src/libcmis/document.cxx
index 7c2a8e6..e7014cb 100644
--- src/libcmis/document.cxx
+++ src/libcmis/document.cxx
@@ -78,7 +78,7 @@ namespace libcmis
     {
         long contentLength = 0;
         map< string, libcmis::PropertyPtr >::const_iterator it = getProperties( ).find( string( "cmis:contentStreamLength" ) );
-        if ( it != getProperties( ).end( ) && !it->second->getStrings( ).empty( ) )
+        if ( it != getProperties( ).end( ) && !it->second->getLongs( ).empty( ) )
             contentLength = it->second->getLongs( ).front( );
         return contentLength;
     }