Compilation error using gcc-strprintf ("%" PRId64, n)

I am trying to compile some code from Github on my (updated), Centos 6.5 using GCC ++.
But I am getting below error when I try to compile the code.

Below is the line with the error:

...
#define __STDC_FORMAT_MACROS 1

...
#include <inttypes.h>

...
inline std::string i64tostr(int64_t n)
{
  return strprintf("%"PRId64, n);   // <-- errors here.
}

...

      

        
        
        
      

    

And the error:

error: expected ')' before 'PRId64

      

        
        
        
      

    

What could be the problem and how to solve it?

Edit 1: This is the error line of the code.
https://github.com/rat4/blackcoin/blob/master/src/util.h#L226

Edit 2: by replacing the code printf ("%" PRId64, n); (note the extra space) as suggested in the suggested answer does not work (the same error message is stated).