diff --git a/cockatrice/src/filter_string.cpp b/cockatrice/src/filter_string.cpp
index 1c1d2787..63758371 100644
--- a/cockatrice/src/filter_string.cpp
+++ b/cockatrice/src/filter_string.cpp
@@ -337,7 +337,7 @@ static void setupParserRules()
 
 FilterString::FilterString(const QString &expr)
 {
-    QByteArray ba = expr.simplified().toLocal8Bit();
+    QByteArray ba = expr.simplified().toUtf8();
 
     std::call_once(init, setupParserRules);
 
diff --git a/common/expression.cpp b/common/expression.cpp
index 0bb1f5ee..370a3864 100644
--- a/common/expression.cpp
+++ b/common/expression.cpp
@@ -95,7 +95,7 @@ double Expression::eval(const peg::Ast &ast)
 
 double Expression::parse(const QString &expr)
 {
-    QByteArray ba = expr.toLocal8Bit();
+    QByteArray ba = expr.toUtf8();
 
     math.enable_ast();