diff --git a/include/mbedtls/ssl.h b/include/mbedtls/ssl.h
index bf7a320..c1c4298 100644
--- a/include/mbedtls/ssl.h
+++ b/include/mbedtls/ssl.h
@@ -3963,15 +3963,12 @@
  *                 (unless they were already set before calling
  *                 mbedtls_ssl_session_reset() and the values are suitable for
  *                 the present connection). Specifically, you want to call
- *                 at least mbedtls_ssl_set_bio(). If you're using a read
- *                 timeout (that is, you called
- *                 mbedtls_ssl_conf_read_timeout() with a non-zero timeout)
- *                 and non-blocking I/O, you also need to set timer callbacks
- *                 by calling mbedtls_ssl_set_timer_cb(). All other SSL setter
- *                 functions are not necessary to call, either because they're
- *                 only used in handshakes, or because the setting is already
- *                 saved. You might choose to call them anyway, for example in
- *                 order to share code between the cases of establishing a new
+ *                 at least mbedtls_ssl_set_bio() and
+ *                 mbedtls_ssl_set_timer_cb(). All other SSL setter functions
+ *                 are not necessary to call, either because they're only used
+ *                 in handshakes, or because the setting is already saved. You
+ *                 might choose to call them anyway, for example in order to
+ *                 share code between the cases of establishing a new
  *                 connection and the case of loading an already-established
  *                 connection.
  *
diff --git a/programs/ssl/ssl_client2.c b/programs/ssl/ssl_client2.c
index 4efd73f..b93d645 100644
--- a/programs/ssl/ssl_client2.c
+++ b/programs/ssl/ssl_client2.c
@@ -2996,7 +2996,6 @@
                             opt.nbio == 0 ? mbedtls_net_recv_timeout : NULL );
 
 #if defined(MBEDTLS_TIMING_C)
-            if( opt.nbio != 0 && opt.read_timeout != 0 )
                 mbedtls_ssl_set_timer_cb( &ssl, &timer,
                                           mbedtls_timing_set_delay,
                                           mbedtls_timing_get_delay );
diff --git a/programs/ssl/ssl_server2.c b/programs/ssl/ssl_server2.c
index dbdb299..7ac3a82 100644
--- a/programs/ssl/ssl_server2.c
+++ b/programs/ssl/ssl_server2.c
@@ -4028,7 +4028,6 @@
                             opt.nbio == 0 ? mbedtls_net_recv_timeout : NULL );
 
 #if defined(MBEDTLS_TIMING_C)
-            if( opt.nbio != 0 && opt.read_timeout != 0 )
                 mbedtls_ssl_set_timer_cb( &ssl, &timer,
                                           mbedtls_timing_set_delay,
                                           mbedtls_timing_get_delay );