I2C and new String abilities from arduno 20


I was using a code similar to this (with #include wstring.h) ;

include Wstring.h

... String myString : String(20); ... Wire.send(myString);

but from arduino 20 this doesn't work anymore. The Wtring is now core of arduino but the same code creates now an error I con't find a way to solve :

no matching function for call to 'TwoWire::send(String&)'

Thanks for advices