diff --git a/libgnucash/engine/mocks/gmock-Account.h b/libgnucash/engine/mocks/gmock-Account.h
index ee00366043..271dac16ce 100644
--- a/libgnucash/engine/mocks/gmock-Account.h
+++ b/libgnucash/engine/mocks/gmock-Account.h
@@ -62,8 +62,8 @@ public:
 
     MOCK_METHOD2(findAccount, Account *(const char*, const char*));
     MOCK_METHOD3(addAccount, void(const char*, const char*, Account*));
-    MOCK_METHOD1(findAccountBayes, Account *(std::vector<const char*>));
-    MOCK_METHOD2(addAccountBayes, void(std::vector<const char*>, Account*));
+    MOCK_METHOD1(findAccountBayes, Account *(std::vector<const char*>&));
+    MOCK_METHOD2(addAccountBayes, void(std::vector<const char*>&, Account*));
 };
 
 #endif