diff --git a/cockatrice/src/deck/custom_line_edit.h b/cockatrice/src/deck/custom_line_edit.h
index e6d003906..075ec012e 100644
--- a/cockatrice/src/deck/custom_line_edit.h
+++ b/cockatrice/src/deck/custom_line_edit.h
@@ -35,7 +35,7 @@ protected:
     void keyPressEvent(QKeyEvent *event) override;
 
 public:
-    SearchLineEdit() : LineEditUnfocusable(), treeView(nullptr)
+    SearchLineEdit() : treeView(nullptr)
     {
     }
     void setTreeView(QTreeView *_treeView)
diff --git a/cockatrice/src/deck/deck_loader.h b/cockatrice/src/deck/deck_loader.h
index d9863ac3e..ceb103009 100644
--- a/cockatrice/src/deck/deck_loader.h
+++ b/cockatrice/src/deck/deck_loader.h
@@ -29,8 +29,8 @@ private:
 
 public:
     DeckLoader();
-    DeckLoader(const QString &nativeString);
-    DeckLoader(const DeckList &other);
+    explicit DeckLoader(const QString &nativeString);
+    explicit DeckLoader(const DeckList &other);
     DeckLoader(const DeckLoader &other);
     const QString &getLastFileName() const
     {
diff --git a/cockatrice/src/deck/deck_stats_interface.h b/cockatrice/src/deck/deck_stats_interface.h
index a6d77d1dc..c3611df81 100644
--- a/cockatrice/src/deck/deck_stats_interface.h
+++ b/cockatrice/src/deck/deck_stats_interface.h
@@ -31,7 +31,7 @@ private slots:
     void getAnalyzeRequestData(DeckList *deck, QByteArray *data);
 
 public:
-    DeckStatsInterface(CardDatabase &_cardDatabase, QObject *parent = nullptr);
+    explicit DeckStatsInterface(CardDatabase &_cardDatabase, QObject *parent = nullptr);
     void analyzeDeck(DeckList *deck);
 };