1 files changed, 1 insertions, 1 deletions

diff --git a/src/xfaces.c b/src/xfaces.c
index 65ce504d270..c6496aa1bd2 100644
--- a/src/xfaces.c
+++ b/src/xfaces.c
@@ -824,7 +824,7 @@ x_free_gc (f, gc)
 
 int
 xstricmp (s1, s2)
-     unsigned char *s1, *s2;
+     const unsigned char *s1, *s2;
 {
   while (*s1 && *s2)
     {