diff --git a/cockatrice/src/client/ui/widgets/visual_deck_storage/visual_deck_storage_tag_filter_widget.cpp b/cockatrice/src/client/ui/widgets/visual_deck_storage/visual_deck_storage_tag_filter_widget.cpp
index 983ab13bd..defde1ced 100644
--- a/cockatrice/src/client/ui/widgets/visual_deck_storage/visual_deck_storage_tag_filter_widget.cpp
+++ b/cockatrice/src/client/ui/widgets/visual_deck_storage/visual_deck_storage_tag_filter_widget.cpp
@@ -136,7 +136,7 @@ void VisualDeckStorageTagFilterWidget::sortTags()
     }
 }
 
-QStringList VisualDeckStorageTagFilterWidget::gatherAllTags()
+QStringList VisualDeckStorageTagFilterWidget::gatherAllTags() const
 {
     QStringList allTags;
     QList<DeckPreviewWidget *> deckWidgets = parent->findChildren<DeckPreviewWidget *>();
@@ -149,7 +149,7 @@ QStringList VisualDeckStorageTagFilterWidget::gatherAllTags()
     return allTags;
 }
 
-QStringList VisualDeckStorageTagFilterWidget::getAllKnownTags()
+QStringList VisualDeckStorageTagFilterWidget::getAllKnownTags() const
 {
     QStringList allTags;
 
diff --git a/cockatrice/src/client/ui/widgets/visual_deck_storage/visual_deck_storage_tag_filter_widget.h b/cockatrice/src/client/ui/widgets/visual_deck_storage/visual_deck_storage_tag_filter_widget.h
index a8726790e..f2a2ab282 100644
--- a/cockatrice/src/client/ui/widgets/visual_deck_storage/visual_deck_storage_tag_filter_widget.h
+++ b/cockatrice/src/client/ui/widgets/visual_deck_storage/visual_deck_storage_tag_filter_widget.h
@@ -12,13 +12,13 @@ class VisualDeckStorageTagFilterWidget : public QWidget
 
 public:
     explicit VisualDeckStorageTagFilterWidget(VisualDeckStorageWidget *_parent);
-    QStringList gatherAllTags();
+    QStringList gatherAllTags() const;
     void filterDecksBySelectedTags(const QList<DeckPreviewWidget *> &deckPreviews) const;
     void removeTagsNotInList(const QStringList &tags);
     void addTagsIfNotPresent(const QStringList &tags);
     void addTagIfNotPresent(const QString &tag);
     void sortTags();
-    QStringList getAllKnownTags();
+    QStringList getAllKnownTags() const;
     VisualDeckStorageWidget *parent;
 
 public slots: