diff --git a/library/ssl_cli.c b/library/ssl_cli.c
index 99d3206..e37a3c0 100644
--- a/library/ssl_cli.c
+++ b/library/ssl_cli.c
@@ -51,6 +51,7 @@
 #include <time.h>
 #endif
 
+#if defined(POLARSSL_SSL_SERVER_NAME_INDICATION)
 static void ssl_write_hostname_ext( ssl_context *ssl,
                                     unsigned char *buf,
                                     size_t *olen )
@@ -100,6 +101,7 @@
 
     *olen = ssl->hostname_len + 9;
 }
+#endif /* POLARSSL_SSL_SERVER_NAME_INDICATION */
 
 static void ssl_write_renegotiation_ext( ssl_context *ssl,
                                          unsigned char *buf,
@@ -534,8 +536,10 @@
 
     // First write extensions, then the total length
     //
+#if defined(POLARSSL_SSL_SERVER_NAME_INDICATION)
     ssl_write_hostname_ext( ssl, p + 2 + ext_len, &olen );
     ext_len += olen;
+#endif
 
     ssl_write_renegotiation_ext( ssl, p + 2 + ext_len, &olen );
     ext_len += olen;
diff --git a/library/ssl_srv.c b/library/ssl_srv.c
index 4a71367..08b3bf9 100644
--- a/library/ssl_srv.c
+++ b/library/ssl_srv.c
@@ -336,6 +336,7 @@
 }
 #endif /* POLARSSL_SSL_SESSION_TICKETS */
 
+#if defined(POLARSSL_SSL_SERVER_NAME_INDICATION)
 static int ssl_parse_servername_ext( ssl_context *ssl,
                                      const unsigned char *buf,
                                      size_t len )
@@ -385,6 +386,7 @@
 
     return( 0 );
 }
+#endif /* POLARSSL_SSL_SERVER_NAME_INDICATION */
 
 static int ssl_parse_renegotiation_info( ssl_context *ssl,
                                          const unsigned char *buf,
@@ -1157,6 +1159,7 @@
         }
         switch( ext_id )
         {
+#if defined(POLARSSL_SSL_SERVER_NAME_INDICATION)
         case TLS_EXT_SERVERNAME:
             SSL_DEBUG_MSG( 3, ( "found ServerName extension" ) );
             if( ssl->f_sni == NULL )
@@ -1166,6 +1169,7 @@
             if( ret != 0 )
                 return( ret );
             break;
+#endif /* POLARSSL_SSL_SERVER_NAME_INDICATION */
 
         case TLS_EXT_RENEGOTIATION_INFO:
             SSL_DEBUG_MSG( 3, ( "found renegotiation extension" ) );
diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index 06eeb71..44309f6 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -35,12 +35,12 @@
 
 #if defined(POLARSSL_SSL_TLS_C)
 
-#include "polarssl/aes.h"
+#include "polarssl/debug.h"
+#include "polarssl/ssl.h"
+
 #include "polarssl/arc4.h"
 #include "polarssl/camellia.h"
 #include "polarssl/des.h"
-#include "polarssl/debug.h"
-#include "polarssl/ssl.h"
 
 #if defined(POLARSSL_GCM_C)
 #include "polarssl/gcm.h"
@@ -3053,8 +3053,10 @@
     memset( ssl-> in_ctr, 0, SSL_BUFFER_LEN );
     memset( ssl->out_ctr, 0, SSL_BUFFER_LEN );
 
+#if defined(POLARSSL_SSL_SERVER_NAME_INDICATION)
     ssl->hostname = NULL;
     ssl->hostname_len = 0;
+#endif
 
 #if defined(POLARSSL_SSL_SESSION_TICKETS)
     ssl->ticket_lifetime = SSL_DEFAULT_TICKET_LIFETIME;
@@ -3356,6 +3358,7 @@
 }
 #endif /* POLARSSL_DHM_C */
 
+#if defined(POLARSSL_SSL_SERVER_NAME_INDICATION)
 int ssl_set_hostname( ssl_context *ssl, const char *hostname )
 {
     if( hostname == NULL )
@@ -3387,6 +3390,7 @@
     ssl->f_sni = f_sni;
     ssl->p_sni = p_sni;
 }
+#endif /* POLARSSL_SSL_SERVER_NAME_INDICATION */
 
 void ssl_set_max_version( ssl_context *ssl, int major, int minor )
 {
@@ -3918,12 +3922,14 @@
     polarssl_free( ssl->ticket_keys );
 #endif
 
+#if defined(POLARSSL_SSL_SERVER_NAME_INDICATION)
     if ( ssl->hostname != NULL)
     {
         memset( ssl->hostname, 0, ssl->hostname_len );
         polarssl_free( ssl->hostname );
         ssl->hostname_len = 0;
     }
+#endif
 
 #if defined(POLARSSL_SSL_HW_RECORD_ACCEL)
     if( ssl_hw_record_finish != NULL )