1 files changed, 1 insertions, 1 deletions

diff --git a/src/ccl.c b/src/ccl.c
index 2be97ba88af..bd9c7d4debe 100644
--- a/src/ccl.c
+++ b/src/ccl.c
@@ -1992,7 +1992,7 @@ See the documentation of `define-ccl-program' for the detail of CCL program.")
                   ? XINT (XVECTOR (reg)->contents[i])
                   : 0);
 
-  ccl_driver (&ccl, (char *)0, (char *)0, 0, 0, (int *)0);
+  ccl_driver (&ccl, (unsigned char *)0, (unsigned char *)0, 0, 0, (int *)0);
   QUIT;
   if (ccl.status != CCL_STAT_SUCCESS)
     error ("Error in CCL program at %dth code", ccl.ic);