diff --git a/plugins/fossil/fossilplugin.h b/plugins/fossil/fossilplugin.h
index 6d647b0706f..e8257eb854c 100644
--- a/plugins/fossil/fossilplugin.h
+++ b/plugins/fossil/fossilplugin.h
@@ -34,7 +34,6 @@
 namespace Core {
 class ActionContainer;
 class CommandLocator;
-class Id;
 } // namespace Core
 
 namespace Fossil {