diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index 420eba2..316d537 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -1263,13 +1263,13 @@
     (void) ssl;
 #endif
 
-#if defined(MBEDTLS_SSL_SESSION_RESUMPTION)
+#if !defined(MBEDTLS_SSL_NO_SESSION_RESUMPTION)
     if( handshake->resume != 0 )
     {
         MBEDTLS_SSL_DEBUG_MSG( 3, ( "no premaster (session resumed)" ) );
         return( 0 );
     }
-#endif /* MBEDTLS_SSL_SESSION_RESUMPTION */
+#endif /* !MBEDTLS_SSL_NO_SESSION_RESUMPTION */
 
     MBEDTLS_SSL_DEBUG_BUF( 3, "premaster secret", handshake->premaster,
                                                   handshake->pmslen );
@@ -7275,9 +7275,9 @@
 
 void mbedtls_ssl_handshake_wrapup( mbedtls_ssl_context *ssl )
 {
-#if defined(MBEDTLS_SSL_SESSION_CACHE)
+#if !defined(MBEDTLS_SSL_NO_SESSION_CACHE)
     int resume = ssl->handshake->resume;
-#endif /* MBEDTLS_SSL_SESSION_CACHE */
+#endif /* !MBEDTLS_SSL_NO_SESSION_CACHE */
 
     MBEDTLS_SSL_DEBUG_MSG( 3, ( "=> handshake wrapup" ) );
 
@@ -7306,7 +7306,7 @@
     ssl->session = ssl->session_negotiate;
     ssl->session_negotiate = NULL;
 
-#if defined(MBEDTLS_SSL_SESSION_CACHE)
+#if !defined(MBEDTLS_SSL_NO_SESSION_CACHE)
     /*
      * Add cache entry
      */
@@ -7317,7 +7317,7 @@
         if( ssl->conf->f_set_cache( ssl->conf->p_cache, ssl->session ) != 0 )
             MBEDTLS_SSL_DEBUG_MSG( 1, ( "cache did not store session" ) );
     }
-#endif /* MBEDTLS_SSL_SESSION_CACHE */
+#endif /* !MBEDTLS_SSL_NO_SESSION_CACHE */
 
 #if defined(MBEDTLS_SSL_PROTO_DTLS)
     if( MBEDTLS_SSL_TRANSPORT_IS_DTLS( ssl->conf->transport ) &&
@@ -7366,7 +7366,7 @@
     ssl->out_msgtype = MBEDTLS_SSL_MSG_HANDSHAKE;
     ssl->out_msg[0]  = MBEDTLS_SSL_HS_FINISHED;
 
-#if defined(MBEDTLS_SSL_SESSION_RESUMPTION)
+#if !defined(MBEDTLS_SSL_NO_SESSION_RESUMPTION)
     /*
      * In case of session resuming, invert the client and server
      * ChangeCipherSpec messages order.
@@ -7383,7 +7383,7 @@
 #endif
     }
     else
-#endif /* MBEDTLS_SSL_SESSION_RESUMPTION */
+#endif /* !MBEDTLS_SSL_NO_SESSION_RESUMPTION */
         ssl->state++;
 
     /*
@@ -7524,7 +7524,7 @@
     memcpy( ssl->peer_verify_data, buf, hash_len );
 #endif
 
-#if defined(MBEDTLS_SSL_SESSION_RESUMPTION)
+#if !defined(MBEDTLS_SSL_NO_SESSION_RESUMPTION)
     if( ssl->handshake->resume != 0 )
     {
 #if defined(MBEDTLS_SSL_CLI_C)
@@ -7537,7 +7537,7 @@
 #endif
     }
     else
-#endif /* MBEDTLS_SSL_SESSION_RESUMPTION */
+#endif /* !MBEDTLS_SSL_NO_SESSION_RESUMPTION */
         ssl->state++;
 
 #if defined(MBEDTLS_SSL_PROTO_DTLS)
@@ -8162,7 +8162,7 @@
     ssl_set_timer( ssl, 0 );
 }
 
-#if defined(MBEDTLS_SSL_SRV_C) && defined(MBEDTLS_SSL_SESSION_CACHE)
+#if defined(MBEDTLS_SSL_SRV_C) && !defined(MBEDTLS_SSL_NO_SESSION_CACHE)
 void mbedtls_ssl_conf_session_cache( mbedtls_ssl_config *conf,
         void *p_cache,
         int (*f_get_cache)(void *, mbedtls_ssl_session *),
@@ -8172,9 +8172,9 @@
     conf->f_get_cache = f_get_cache;
     conf->f_set_cache = f_set_cache;
 }
-#endif /* MBEDTLS_SSL_SRV_C && MBEDTLS_SSL_SESSION_CACHE */
+#endif /* MBEDTLS_SSL_SRV_C && !MBEDTLS_SSL_NO_SESSION_CACHE */
 
-#if defined(MBEDTLS_SSL_CLI_C) && defined(MBEDTLS_SSL_SESSION_CACHE)
+#if defined(MBEDTLS_SSL_CLI_C) && !defined(MBEDTLS_SSL_NO_SESSION_RESUMPTION)
 int mbedtls_ssl_set_session( mbedtls_ssl_context *ssl, const mbedtls_ssl_session *session )
 {
     int ret;
@@ -8195,7 +8195,7 @@
 
     return( 0 );
 }
-#endif /* MBEDTLS_SSL_CLI_C && MBEDTLS_SSL_SESSION_CACHE */
+#endif /* MBEDTLS_SSL_CLI_C && !MBEDTLS_SSL_NO_SESSION_RESUMPTION */
 
 void mbedtls_ssl_conf_ciphersuites( mbedtls_ssl_config *conf,
                                    const int *ciphersuites )