diff --git a/cbox-tree.d/usr/share/cryptobox/templates/macros.cs b/cbox-tree.d/usr/share/cryptobox/templates/macros.cs
index 57cbe36..a21de43 100644
--- a/cbox-tree.d/usr/share/cryptobox/templates/macros.cs
+++ b/cbox-tree.d/usr/share/cryptobox/templates/macros.cs
@@ -85,7 +85,7 @@
 <?cs def:print_form_header() ?><?cs #
 # the header of a form - including Data.PostData values as hidden fields
 #	?><form action="<?cs var:ScriptName ?>" method="post" enctype="application/x-www-form-urlencoded">
-	?><form action="<?cs var:ScriptName ?>" method="post" enctype="application/multipart/form-data">
+	?><form action="<?cs var:ScriptName ?>" method="post" enctype="multipart/form-data" accept-charset="utf-8">
 	<?cs each:item = Data.PostData
 		?><input type="hidden" name="<?cs name:item ?>" value="<?cs var:item ?>" /><?cs
 	/each ?><?cs