diff --git a/src/colnod/databaseapi.h b/src/colnod/databaseapi.h
index 31b5828..a4460cd 100644
--- a/src/colnod/databaseapi.h
+++ b/src/colnod/databaseapi.h
@@ -37,7 +37,7 @@ class DatabaseAPI : public QObject
 {
     Q_OBJECT
 public:
-    DatabaseAPI(serversdk::DatabaseManager *dbMan);
+    explicit DatabaseAPI(serversdk::DatabaseManager *dbMan);
 
     bool open();