diff --git a/programs/ssl/dtls_client.c b/programs/ssl/dtls_client.c
index 0b837ba..e753db2 100644
--- a/programs/ssl/dtls_client.c
+++ b/programs/ssl/dtls_client.c
@@ -35,18 +35,14 @@
 #endif
 
 #if !defined(MBEDTLS_SSL_CLI_C) || !defined(MBEDTLS_SSL_PROTO_DTLS) ||    \
-    !defined(MBEDTLS_NET_C) ||                                             \
+    !defined(MBEDTLS_NET_C)  || !defined(MBEDTLS_TIMING_C) ||             \
     !defined(MBEDTLS_ENTROPY_C) || !defined(MBEDTLS_CTR_DRBG_C) ||        \
     !defined(MBEDTLS_X509_CRT_PARSE_C) || !defined(MBEDTLS_RSA_C) ||      \
     !defined(MBEDTLS_CERTS_C)
-
-int main( int argc, char *argv[] )
+int main( void )
 {
-    ((void) argc);
-    ((void) argv);
-
     mbedtls_printf( "MBEDTLS_SSL_CLI_C and/or MBEDTLS_SSL_PROTO_DTLS and/or "
-            "MBEDTLS_NET_C and/or "
+            "MBEDTLS_NET_C and/or MBEDTLS_TIMING_C and/or "
             "MBEDTLS_ENTROPY_C and/or MBEDTLS_CTR_DRBG_C and/or "
             "MBEDTLS_X509_CRT_PARSE_C and/or MBEDTLS_RSA_C and/or "
             "MBEDTLS_CERTS_C and/or MBEDTLS_PEM_PARSE_C not defined.\n" );
@@ -95,6 +91,7 @@
     mbedtls_ssl_context ssl;
     mbedtls_ssl_config conf;
     mbedtls_x509_crt cacert;
+    mbedtls_timing_delay_context timer;
 
     ((void) argc);
     ((void) argv);
@@ -194,6 +191,9 @@
     mbedtls_ssl_set_bio( &ssl, &server_fd,
                          mbedtls_net_send, mbedtls_net_recv, mbedtls_net_recv_timeout );
 
+    mbedtls_ssl_set_timer_cb( &ssl, &timer, mbedtls_timing_set_delay,
+                                            mbedtls_timing_get_delay );
+
     mbedtls_printf( " ok\n" );
 
     /*
@@ -342,6 +342,6 @@
     return( ret );
 }
 #endif /* MBEDTLS_SSL_CLI_C && MBEDTLS_SSL_PROTO_DTLS && MBEDTLS_NET_C &&
-          MBEDTLS_ENTROPY_C && MBEDTLS_CTR_DRBG_C &&
+          MBEDTLD_TIMING_C && MBEDTLS_ENTROPY_C && MBEDTLS_CTR_DRBG_C &&
           MBEDTLS_X509_CRT_PARSE_C && MBEDTLS_RSA_C && MBEDTLS_CERTS_C &&
           MBEDTLS_PEM_PARSE_C */