diff --git a/core/sourcereference.h b/core/sourcereference.h
index 4fd93574d..6b373d993 100644
--- a/core/sourcereference.h
+++ b/core/sourcereference.h
@@ -54,6 +54,8 @@ class OKULAR_EXPORT SourceReference
     private:
         class Private;
         Private* const d;
+
+        Q_DISABLE_COPY( SourceReference )
 };
 
 }