--- a/mailnews/compose/src/nsMsgComposeService.cpp
+++ b/mailnews/compose/src/nsMsgComposeService.cpp
@@ -565,16 +565,17 @@ nsMsgComposeService::OpenComposeWindow(c
     || type == nsIMsgCompType::ReplyWithTemplate || type == nsIMsgCompType::Redirect)
   {
     nsCAutoString uriToOpen(originalMsgURI);
     uriToOpen += (uriToOpen.FindChar('?') == kNotFound) ? "?" : "&";
     uriToOpen.Append("fetchCompleteMessage=true");
     if (type == nsIMsgCompType::Redirect)
       uriToOpen.Append("&redirect=true");
 
+    aMsgWindow->SetCharsetOverride(true);
     return LoadDraftOrTemplate(uriToOpen, type == nsIMsgCompType::ForwardInline || type == nsIMsgCompType::Draft ?
                                nsMimeOutput::nsMimeMessageDraftOrTemplate : nsMimeOutput::nsMimeMessageEditorTemplate,
                                identity, originalMsgURI, origMsgHdr, type == nsIMsgCompType::ForwardInline,
                                format == nsIMsgCompFormat::OppositeOfDefault, aMsgWindow);
   }
 
   nsCOMPtr<nsIMsgComposeParams> pMsgComposeParams (do_CreateInstance(NS_MSGCOMPOSEPARAMS_CONTRACTID, &rv));
   if (NS_SUCCEEDED(rv) && pMsgComposeParams)