X-Git-Url: https://git.distorted.org.uk/u/mdw/putty/blobdiff_plain/57356d6317f6f33dd622711d305c4579df63b269..c85623f918b8a6c639afc15604414f9b113bb20d:/misc.h

diff --git a/misc.h b/misc.h
index 21540a3b..456cda06 100644
--- a/misc.h
+++ b/misc.h
@@ -28,7 +28,7 @@ typedef struct bufchain_tag {
 void bufchain_init(bufchain *ch);
 void bufchain_clear(bufchain *ch);
 int bufchain_size(bufchain *ch);
-void bufchain_add(bufchain *ch, void *data, int len);
+void bufchain_add(bufchain *ch, const void *data, int len);
 void bufchain_prefix(bufchain *ch, void **data, int *len);
 void bufchain_consume(bufchain *ch, int len);
 void bufchain_fetch(bufchain *ch, void *data, int len);