1 files changed, 1 insertions, 1 deletions

diff --git a/infback.c b/infback.c
index 981aff1..f3833c2 100644
--- a/infback.c
+++ b/infback.c
@@ -255,7 +255,7 @@ out_func out;
 void FAR *out_desc;
 {
     struct inflate_state FAR *state;
-    unsigned char FAR *next;    /* next input */
+    z_const unsigned char FAR *next;    /* next input */
     unsigned char FAR *put;     /* next output */
     unsigned have, left;        /* available input and output */
     unsigned long hold;         /* bit buffer */