1 files changed, 1 insertions, 1 deletions
diff --git a/vnc.c b/vnc.c
index 109c2f34e3..e1ca9f8c75 100644
--- a/vnc.c
+++ b/vnc.c
@@ -961,7 +961,7 @@ long vnc_client_write_buf(VncState *vs, const uint8_t *data, size_t datalen)
         }
     } else
 #endif /* CONFIG_VNC_TLS */
-        ret = send(vs->csock, (void *)data, datalen, 0);
+        ret = send(vs->csock, (const void *)data, datalen, 0);
     VNC_DEBUG("Wrote wire %p %zd -> %ld\n", data, datalen, ret);
     return vnc_client_io_error(vs, ret, socket_error());
 }