diff --git a/src/colnod/databaseapi.h b/src/colnod/databaseapi.h
index a9a18b2..ef71c1e 100644
--- a/src/colnod/databaseapi.h
+++ b/src/colnod/databaseapi.h
@@ -25,7 +25,7 @@ public:
     bool executeQuery(QSqlQuery &query, const QString &statement = QString());
 
     std::shared_ptr<Data> downloadData();
-    void processData(const std::shared_ptr<Data> &data);
+    bool processData(const std::shared_ptr<Data> &data);
     qint64 getLastSync();
     void setLastSync(qint64 timestamp);
     void setLastUpdate(const QHash<QString, std::shared_ptr<Token> > &tokens);