1 files changed, 4 insertions, 2 deletions

diff --git a/src/xdisp.c b/src/xdisp.c
index a6706b00c3c..ed1d248990c 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -25640,7 +25640,8 @@ display_mode_element (struct it *it, int depth, int field_width, int precision,
                     /* Non-ASCII characters in SPEC should cause mode-line
                        element be displayed as a multibyte string.  */
                     ptrdiff_t nbytes = strlen (spec);
-                    if (multibyte_chars_in_text (spec, nbytes) != nbytes)
+                    if (multibyte_chars_in_text ((const unsigned char *)spec,
+                                                 nbytes) != nbytes)
                       multibyte = true;
 
                     switch (mode_line_target)
@@ -26261,7 +26262,8 @@ decode_mode_spec_coding (Lisp_Object coding_system, char *buf, bool eol_flag)
       eolvalue = AREF (val, 2);
 
       if (multibyte)
-        buf += CHAR_STRING (XFIXNAT (CODING_ATTR_MNEMONIC (attrs)), buf);
+        buf += CHAR_STRING (XFIXNAT (CODING_ATTR_MNEMONIC (attrs)),
+                            (unsigned char *) buf);
       else
         *buf++ = ' ';