diff --git a/libgnucash/engine/mocks/gmock-Transaction.h b/libgnucash/engine/mocks/gmock-Transaction.h
index f0901fb1b4..d5c518d649 100644
--- a/libgnucash/engine/mocks/gmock-Transaction.h
+++ b/libgnucash/engine/mocks/gmock-Transaction.h
@@ -6,7 +6,6 @@
 #include <Transaction.h>
 #include <TransactionP.h>
 
-#include "gmock-qofbook.h"
 #include "gmock-gobject.h"