diff --git a/ssl/internal.h b/ssl/internal.h
index 0bc0b8e..bdb392c 100644
--- a/ssl/internal.h
+++ b/ssl/internal.h
@@ -683,7 +683,7 @@
 void ssl_do_info_callback(const SSL *ssl, int type, int value);
 
 /* ssl_do_msg_callback calls |ssl|'s message callback, if set. */
-void ssl_do_msg_callback(SSL *ssl, int is_write, int version, int content_type,
+void ssl_do_msg_callback(SSL *ssl, int is_write, int content_type,
                          const void *buf, size_t len);