--- iscan-2.30.1/lib/jpegstream.cc.old	2016-10-12 02:55:47.345862674 -0400
+++ iscan-2.30.1/lib/jpegstream.cc	2016-10-12 03:02:53.790439580 -0400
@@ -82,7 +82,7 @@
         //        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 ((int) i, (int) 8 * sizeof (JSAMPLE));
             int offset = 8 * sizeof (JSAMPLE) - 1 - index.rem;
             _scanline[i] = ((line[index.quot] & (1 << offset))
                             ? 0 : ~0);