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Message: [QUOTE="Jason Curl, post: 2394055"] From what I gather reading the C FAQ is the best way is to typecast NULL to (char*) as it could be such a machine where an (int*) has a different representation to (char*). The compiler wouldn't know what to cast a (void*) to. I guess it works because on most machines (void*) has the same representation internally as (int*) and (char*). It appears from everything I've read so far that just using NULL is not portable, as it was my original intention of a slight optimisation of using calloc instead of malloc and setting the pointers to NULL explicitly. [/QUOTE]