diff --git a/src/Handler/Sheet.hs b/src/Handler/Sheet.hs
index fd44994ff..ddf39d970 100644
--- a/src/Handler/Sheet.hs
+++ b/src/Handler/Sheet.hs
@@ -579,7 +579,7 @@ correctorForm shid = do
                            { fvInput = [whamlet|
                                <div>
                                  ^{fvInput addTutView}
-                                 <button type=submit formnovalidate>Hinzufügen
+                                 <button type=submit formnovalidate data-formnorequired>Hinzufügen
                              |]
                            }
                        ])