diff --git a/ssl/ssl_locl.h b/ssl/ssl_locl.h
index cb67d311b1..f2442544e3 100644
--- a/ssl/ssl_locl.h
+++ b/ssl/ssl_locl.h
@@ -362,8 +362,8 @@ int ssl2_enc_init(SSL *s, int client);
 void ssl2_generate_key_material(SSL *s);
 void ssl2_enc(SSL *s,int send_data);
 void ssl2_mac(SSL *s,unsigned char *mac,int send_data);
-SSL_CIPHER *ssl2_get_cipher_by_char(unsigned char *p);
-int ssl2_put_cipher_by_char(SSL_CIPHER *c,unsigned char *p);
+SSL_CIPHER *ssl2_get_cipher_by_char(const unsigned char *p);
+int ssl2_put_cipher_by_char(const SSL_CIPHER *c,unsigned char *p);
 int ssl2_part_read(SSL *s, unsigned long f, int i);
 int ssl2_do_write(SSL *s);
 int ssl2_set_certificate(SSL *s, int type, int len, unsigned char *data);
@@ -377,15 +377,15 @@ int	ssl2_accept(SSL *s);
 int	ssl2_connect(SSL *s);
 int	ssl2_read(SSL *s, char *buf, int len);
 int	ssl2_peek(SSL *s, char *buf, int len);
-int	ssl2_write(SSL *s, char *buf, int len);
+int	ssl2_write(SSL *s, const char *buf, int len);
 int	ssl2_shutdown(SSL *s);
 void	ssl2_clear(SSL *s);
 long	ssl2_ctrl(SSL *s,int cmd, long larg, char *parg);
 long	ssl2_ctx_ctrl(SSL_CTX *s,int cmd, long larg, char *parg);
 int	ssl2_pending(SSL *s);
 
-SSL_CIPHER *ssl3_get_cipher_by_char(unsigned char *p);
-int ssl3_put_cipher_by_char(SSL_CIPHER *c,unsigned char *p);
+SSL_CIPHER *ssl3_get_cipher_by_char(const unsigned char *p);
+int ssl3_put_cipher_by_char(const SSL_CIPHER *c,unsigned char *p);
 void ssl3_init_finished_mac(SSL *s);
 int ssl3_send_server_certificate(SSL *s);
 int ssl3_get_finished(SSL *s,int state_a,int state_b);
@@ -423,7 +423,7 @@ int	ssl3_accept(SSL *s);
 int	ssl3_connect(SSL *s);
 int	ssl3_read(SSL *s, char *buf, int len);
 int	ssl3_peek(SSL *s,char *buf, int len);
-int	ssl3_write(SSL *s, char *buf, int len);
+int	ssl3_write(SSL *s, const char *buf, int len);
 int	ssl3_shutdown(SSL *s);
 void	ssl3_clear(SSL *s);
 long	ssl3_ctrl(SSL *s,int cmd, long larg, char *parg);