--- a/lib/jpegstream.cc

+++ b/lib/jpegstream.cc

@@ -33,7 +33,7 @@

 #include "jpegstream.hh"

-#include <cstdlib>

+//#include <cstdlib>

 #include <ios>

 namespace iscan

@@ -82,7 +82,8 @@ namespace iscan

         //        only that _bits != 8.

         for (unsigned int i = 0; i < _h_sz; ++i)

           {

-            div_t index = div (i, 8 * sizeof (JSAMPLE));

+            div_t index = div (static_cast<int>(i),

+                               static_cast<int>(8 * sizeof (JSAMPLE)));

             int offset = 8 * sizeof (JSAMPLE) - 1 - index.rem;

             _scanline[i] = ((line[index.quot] & (1 << offset))

                             ? 0 : ~0);

​