diff --git a/libcockatrice_card/libcockatrice/card/database/card_database_loader.cpp b/libcockatrice_card/libcockatrice/card/database/card_database_loader.cpp
index 00b21f88e..7ca5ba433 100644
--- a/libcockatrice_card/libcockatrice/card/database/card_database_loader.cpp
+++ b/libcockatrice_card/libcockatrice/card/database/card_database_loader.cpp
@@ -83,7 +83,7 @@ LoadStatus CardDatabaseLoader::loadCardDatabase(const QString &path, CardDatabas
     auto startTime = QTime::currentTime();
     LoadStatus tempLoadStatus = NotLoaded;
     if (!path.isEmpty()) {
-        QMutexLocker locker(loadFromFileMutex);
+        QMutexLocker locker(&loadFromFileMutex);
         tempLoadStatus = loadFromFile(path, data);
     }
 
@@ -102,7 +102,7 @@ LoadStatus CardDatabaseLoader::loadCardDatabases(bool ignoreCache)
 
 LoadStatus CardDatabaseLoader::doLoadCardDatabases(bool ignoreCache)
 {
-    QMutexLocker locker(reloadDatabaseMutex);
+    QMutexLocker locker(&reloadDatabaseMutex);
 
     if (!database) {
         qCWarning(CardDatabaseLoadingLog) << "Loader has no database pointer";
diff --git a/libcockatrice_card/libcockatrice/card/database/card_database_loader.h b/libcockatrice_card/libcockatrice/card/database/card_database_loader.h
index bfbaa0f51..72aeeff3e 100644
--- a/libcockatrice_card/libcockatrice/card/database/card_database_loader.h
+++ b/libcockatrice_card/libcockatrice/card/database/card_database_loader.h
@@ -177,8 +177,8 @@ private:
     ICardSetPriorityController *priorityController; /**< Controller for reconstructing set state. */
     QList<ICardDatabaseParser *> availableParsers;  /**< List of available parsers for different formats. */
 
-    QBasicMutex *loadFromFileMutex = new QBasicMutex();   /**< Mutex for single-file loading. */
-    QBasicMutex *reloadDatabaseMutex = new QBasicMutex(); /**< Mutex for reloading entire database. */
+    QBasicMutex loadFromFileMutex;   /**< Mutex for single-file loading. */
+    QBasicMutex reloadDatabaseMutex; /**< Mutex for reloading entire database. */
 };
 
 #endif // COCKATRICE_CARD_DATABASE_LOADER_H