1 files changed, 2 insertions, 1 deletions

diff --git a/src/xdisp.c b/src/xdisp.c
index 0c7ce90781f..399cd0ebae2 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -333,11 +333,12 @@ message_dolog (m, len, nlflag, multibyte)
                && ! NILP (current_buffer->enable_multibyte_characters))
         {
           int i = 0;
+          unsigned char *msg = (unsigned char *) m;
           /* Convert a single-byte string to multibyte
              for the *Message* buffer.  */
           while (i < len)
             {
-              int c = unibyte_char_to_multibyte (m[i++]);
+              int c = unibyte_char_to_multibyte (msg[i++]);
               insert_char (c);
             }
         }