diff --git a/qt/widgets/common/inc/MantidQtWidgets/Common/FitScriptGeneratorDataTable.h b/qt/widgets/common/inc/MantidQtWidgets/Common/FitScriptGeneratorDataTable.h
index 5106be006cfcf475467cc497a566c3030cd41973..aff4940089b73ef8ebb91388a23866aaaa2be4c5 100644
--- a/qt/widgets/common/inc/MantidQtWidgets/Common/FitScriptGeneratorDataTable.h
+++ b/qt/widgets/common/inc/MantidQtWidgets/Common/FitScriptGeneratorDataTable.h
@@ -59,7 +59,7 @@ public:
   [[nodiscard]] std::vector<FitDomainIndex> selectedRows() const;
   [[nodiscard]] FitDomainIndex currentRow() const;
 
-  bool hasLoadedData() const;
+  [[nodiscard]] bool hasLoadedData() const;
 
   [[nodiscard]] QString selectedDomainFunctionPrefix() const;