--- backend/canon-sane.c.orig	2006-12-08 12:05:25.000000000 +0100
+++ backend/canon-sane.c	2006-12-08 13:13:33.000000000 +0100
@@ -1797,7 +1797,8 @@ read_fs2710 (SANE_Handle handle, SANE_By
       for (p = buf; p < buf + nread; p++)
 	{
 	  b = *p;
-	  *p++ = *(p + 1);
+	  *p = *(p + 1);
+	  p++;
 	  *p = b;
 	}
 #endif