diff --git a/src/libs/aggregation/aggregate.h b/src/libs/aggregation/aggregate.h
index de218d82f12..383f0b3511e 100644
--- a/src/libs/aggregation/aggregate.h
+++ b/src/libs/aggregation/aggregate.h
@@ -51,7 +51,7 @@ signals:
     void changed();
 
 private:
-    friend void aggregate(QList<QObject *>);
+    friend AGGREGATION_EXPORT void aggregate(QList<QObject *>);
     enum PrivateConstructor { PrivateConstructor };
     Aggregate(enum PrivateConstructor);
     void construct();