diff --git a/repos/os/include/audio_in_session/audio_in_session.h b/repos/os/include/audio_in_session/audio_in_session.h
index f2fe2b39e5..8f2cc1f394 100644
--- a/repos/os/include/audio_in_session/audio_in_session.h
+++ b/repos/os/include/audio_in_session/audio_in_session.h
@@ -14,7 +14,7 @@
  */
 
 /*
- * Copyright (C) 2015-2017 Genode Labs GmbH
+ * Copyright (C) 2015-2022 Genode Labs GmbH
  *
  * This file is part of the Genode OS framework, which is distributed
  * under the terms of the GNU Affero General Public License version 3.
@@ -162,6 +162,21 @@ class Audio_in::Stream
 		 */
 		unsigned tail() const { return _tail; }
 
+		/**
+		 * Number of packets between record and allocation position
+		 *
+		 * \return number
+		 */
+		unsigned queued() const
+		{
+			if (_tail > _pos)
+				return _tail - _pos;
+			else if (_pos > _tail)
+				return QUEUE_SIZE - (_pos - _tail);
+			else
+				return 0;
+		}
+
 		/**
 		 * Retrieve next packet for given packet
 		 *