diff --git a/mainwindow.cpp b/mainwindow.cpp
index cdc81f1..3b083a3 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -6157,7 +6157,7 @@ void MainWindow::on_extFreeTextMsgEdit_currentTextChanged (QString const& text)
 {
     QString x;
     QString::const_iterator i;
-    auto validChars = Varicode::huffValidChars();
+    QSet<QString> validChars = Varicode::huffValidChars();
     for(i = text.constBegin(); i != text.constEnd(); i++){
         auto ch = (*i).toUpper();
         if(validChars.contains(ch) || ch == '\n'){
diff --git a/messagereplydialog.cpp b/messagereplydialog.cpp
index 34c9e6c..fb82188 100644
--- a/messagereplydialog.cpp
+++ b/messagereplydialog.cpp
@@ -3,6 +3,8 @@
 
 #include "varicode.h"
 
+#include <QSet>
+
 MessageReplyDialog::MessageReplyDialog(QWidget *parent) :
     QDialog(parent),
     ui(new Ui::MessageReplyDialog)
@@ -32,7 +34,7 @@ void MessageReplyDialog::on_textEdit_textChanged(){
 
     QString x;
     QString::const_iterator i;
-    auto validChars = Varicode::huffValidChars();
+    QSet<QString> validChars = Varicode::huffValidChars();
     for(i = text.constBegin(); i != text.constEnd(); i++){
         auto ch = (*i).toUpper();
         if(validChars.contains(ch)){