1 files changed, 1 insertions, 1 deletions

diff --git a/src/fileio.c b/src/fileio.c
index 5814e2794e5..8aa87038cfd 100644
--- a/src/fileio.c
+++ b/src/fileio.c
@@ -3767,7 +3767,7 @@ This does code conversion according to the value of\n\
         {
           /* try is reserved in some compilers (Microsoft C) */
           int trytry = min (total - how_much, READ_BUF_SIZE - unprocessed);
-          char *destination = read_buf + unprocessed;
+          unsigned char *destination = read_buf + unprocessed;
           int this;
 
           /* Allow quitting out of the actual I/O.  */