diff --git a/src/collection/collectionwatcher.cpp b/src/collection/collectionwatcher.cpp
index 07273f21d..1c6976ecf 100644
--- a/src/collection/collectionwatcher.cpp
+++ b/src/collection/collectionwatcher.cpp
@@ -941,7 +941,7 @@ void CollectionWatcher::AddChangedSong(const QString &file, const Song &matching
 
 }
 
-void CollectionWatcher::PerformEBUR128Analysis(Song &song) {
+void CollectionWatcher::PerformEBUR128Analysis(Song &song) const {
 
   if (!song_ebur128_loudness_analysis_) return;
 
diff --git a/src/collection/collectionwatcher.h b/src/collection/collectionwatcher.h
index 86f3eef13..482074fc3 100644
--- a/src/collection/collectionwatcher.h
+++ b/src/collection/collectionwatcher.h
@@ -199,7 +199,7 @@ class CollectionWatcher : public QObject {
 
   static void AddChangedSong(const QString &file, const Song &matching_song, const Song &new_song, ScanTransaction *t);
 
-  void PerformEBUR128Analysis(Song &song);
+  void PerformEBUR128Analysis(Song &song) const;
 
   quint64 FilesCountForPath(ScanTransaction *t, const QString &path);
   quint64 FilesCountForSubdirs(ScanTransaction *t, const CollectionSubdirectoryList &subdirs, QMap<QString, quint64> &subdir_files_count);