diff --git a/src/controllers/bulk/bulkenumerator.h b/src/controllers/bulk/bulkenumerator.h
index c19357ddfde..cb63a553db8 100644
--- a/src/controllers/bulk/bulkenumerator.h
+++ b/src/controllers/bulk/bulkenumerator.h
@@ -7,7 +7,7 @@
 #include "preferences/usersettings.h"
 
 struct libusb_context;
-struct BulkController;
+class BulkController;
 
 /// Locate supported USB bulk controllers
 class BulkEnumerator : public ControllerEnumerator {