diff --git a/ChangeLog b/ChangeLog
index c664920..6ae503c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2018-10-12  NIIBE Yutaka  <gniibe@fsij.org>
+
+	* src/usb-ccid.c (ccid_thread): Notify host about ack button.
+
 2018-10-02  NIIBE Yutaka  <gniibe@fsij.org>
 
 	* src/stack-def.h (SIZE_0): Increase.
diff --git a/NEWS b/NEWS
index a69238f..85c772c 100644
--- a/NEWS
+++ b/NEWS
@@ -864,6 +864,7 @@ Gnuk Token could run with GPG4WIN on MS Windows.  GPG4WIN runs with
 
 ** This is initial release.  Only it supports digital signing.
 
-Local Variables:
-mode: outline
-End:
+
+# Local Variables:
+# mode: outline
+# End:
diff --git a/src/usb-ccid.c b/src/usb-ccid.c
index 2efe054..3f947e6 100644
--- a/src/usb-ccid.c
+++ b/src/usb-ccid.c
@@ -1858,6 +1858,7 @@ ccid_thread (void *arg)
 	    ackbtn_enable ();
 	    led_blink (LED_WAIT_FOR_BUTTON);
 	    c->ccid_state = CCID_STATE_ACK_REQUIRED_0;
+	    ccid_send_data_block_time_extension (c);
 	  }
 	else
 	  {