diff --git a/src/tag/Id3Unique.hxx b/src/tag/Id3Unique.hxx
index b2117e0d8..f380010bb 100644
--- a/src/tag/Id3Unique.hxx
+++ b/src/tag/Id3Unique.hxx
@@ -25,7 +25,7 @@
 #include <memory>
 
 struct Id3Delete {
-	void operator()(struct id3_tag *tag) {
+	void operator()(struct id3_tag *tag) noexcept {
 		id3_tag_delete(tag);
 	}
 };