diff --git a/src/input/AsyncInputStream.hxx b/src/input/AsyncInputStream.hxx
index 29668a125..5d0aac31e 100644
--- a/src/input/AsyncInputStream.hxx
+++ b/src/input/AsyncInputStream.hxx
@@ -18,10 +18,6 @@
  * the regular #InputStream API.
  */
 class AsyncInputStream : public InputStream {
-	enum class SeekState : uint8_t {
-		NONE, SCHEDULED, PENDING
-	};
-
 	InjectEvent deferred_resume;
 	InjectEvent deferred_seek;
 
@@ -30,6 +26,10 @@ class AsyncInputStream : public InputStream {
 	CircularBuffer<std::byte> buffer;
 	const size_t resume_at;
 
+	enum class SeekState : uint_least8_t {
+		NONE, SCHEDULED, PENDING
+	} seek_state = SeekState::NONE;
+
 	bool open = true;
 
 	/**
@@ -39,8 +39,6 @@ class AsyncInputStream : public InputStream {
 	 */
 	bool paused = false;
 
-	SeekState seek_state = SeekState::NONE;
-
 	/**
 	 * The #Tag object ready to be requested via
 	 * InputStream::ReadTag().