diff -r 00e88487a654 -r 591473851c95 src/buffer.c
--- a/src/buffer.c	Mon Nov 20 18:06:32 2017 +0100
+++ b/src/buffer.c	Tue Jan 02 17:00:21 2018 +0100
@@ -225,7 +225,7 @@
     if (ucx_buffer_eof(buffer)) {
         return EOF;
     } else {
-        int c = buffer->space[buffer->pos];
+        int c = ((unsigned char*)buffer->space)[buffer->pos];
         buffer->pos++;
         return c;
     }