Index: trunk/Ohana/src/libfits/include/gfitsio.h
===================================================================
--- trunk/Ohana/src/libfits/include/gfitsio.h	(revision 41375)
+++ trunk/Ohana/src/libfits/include/gfitsio.h	(revision 41395)
@@ -19,5 +19,5 @@
 
 /* gfits_bintable_format returns 'byte' as the type associated with one-byte logical (non-char) values */
-typedef char byte;
+typedef unsigned char byte;
 
 /********** FITS Constants *********/