1 files changed, 1 insertions, 1 deletions
diff --git a/lib/nssg.h b/lib/nssg.h
index 0c6cd5d63..183998cd1 100644
--- a/lib/nssg.h
+++ b/lib/nssg.h
@@ -45,7 +45,7 @@ void Curl_nss_cleanup(void);
 
 int Curl_nss_send(struct connectdata *conn,
                   int sockindex,
-                  void *mem,
+                  const void *mem,
                   size_t len);
 ssize_t Curl_nss_recv(struct connectdata *conn, /* connection data */
                       int num,                  /* socketindex */