diff --git a/src/serversdk/databaseutils.h b/src/serversdk/databaseutils.h
index 3fe6252..03c6dfa 100644
--- a/src/serversdk/databaseutils.h
+++ b/src/serversdk/databaseutils.h
@@ -10,7 +10,7 @@ class DatabaseUtils : public QObject
 {
     Q_OBJECT
 public:
-    DatabaseUtils(const QString type = "SQLITE");
+    explicit DatabaseUtils(const QString type = "SQLITE");
     QString createTableSQL(const DatabaseTable *table, const QString table_name) const;
 
     QString sqlType() const;