diff --git a/src/output/Control.hxx b/src/output/Control.hxx
index 3a961c57c..c4dd2b901 100644
--- a/src/output/Control.hxx
+++ b/src/output/Control.hxx
@@ -404,7 +404,7 @@ public:
 	gcc_pure
 	bool LockIsChunkConsumed(const MusicChunk &chunk) const noexcept;
 
-	void ClearTailChunk(const MusicChunk &chunk) {
+	void ClearTailChunk(const MusicChunk &chunk) noexcept {
 		source.ClearTailChunk(chunk);
 	}