1 files changed, 6 insertions, 3 deletions

diff --git a/src/buffer.c b/src/buffer.c
index c2159627eb5..7b33c71daef 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -2256,12 +2256,15 @@ overlay_strings (pos, w, pstr)
     {
       Lisp_Object tem;
       int i;
-      char *p;
+      unsigned char *p;
       int total = overlay_heads.bytes + overlay_tails.bytes;
 
       if (total > overlay_str_len)
-        overlay_str_buf = (char *)xrealloc (overlay_str_buf,
-                                            overlay_str_len = total);
+        {
+          overlay_str_len = total;
+          overlay_str_buf = (unsigned char *)xrealloc (overlay_str_buf,
+                                                       total);
+        }
       p = overlay_str_buf;
       for (i = overlay_tails.used; --i >= 0;)
         {