diff --git a/scriptengine.cpp b/scriptengine.cpp
index 670dcd6..437efbd 100644
--- a/scriptengine.cpp
+++ b/scriptengine.cpp
@@ -485,10 +485,10 @@ bool File::modifyFITSRecords(const FITSRecordModify *modify)
                 modifyXISF.removeFITSKeyword(0, remove.toStdString());
 
             for(auto &record : modify->_update)
-                modifyXISF.updateFITSKeyword(0, {record.key.toStdString(), record.value.toString().toStdString(), record.value.toString().toStdString()}, true);
+                modifyXISF.updateFITSKeyword(0, {record.key.toStdString(), record.value.toString().toStdString(), record.comment.toStdString()}, true);
 
             for(auto &record : modify->_add)
-                modifyXISF.addFITSKeyword(0, {record.key.toStdString(), record.value.toString().toStdString(), record.value.toString().toStdString()});
+                modifyXISF.addFITSKeyword(0, {record.key.toStdString(), record.value.toString().toStdString(), record.comment.toStdString()});
 
             modifyXISF.save(out.absoluteFilePath().toLocal8Bit().toStdString());
             modifyXISF.close();