1 files changed, 1 insertions, 1 deletions

diff --git a/src/fontset.c b/src/fontset.c
index 840555b427d..04a28ca96ed 100644
--- a/src/fontset.c
+++ b/src/fontset.c
@@ -399,7 +399,7 @@ fontset_pattern_regexp (pattern)
 
       /* Convert "*" to ".*", "?" to ".".  */
       *p1++ = '^';
-      for (p0 = XSTRING (pattern)->data; *p0; p0++)
+      for (p0 = (char *) XSTRING (pattern)->data; *p0; p0++)
         {
           if (*p0 == '*')
             {