diff --git a/src/plugins/squish/objectsmapdocument.cpp b/src/plugins/squish/objectsmapdocument.cpp
index 32d0804efa2..0d277900d6b 100644
--- a/src/plugins/squish/objectsmapdocument.cpp
+++ b/src/plugins/squish/objectsmapdocument.cpp
@@ -12,7 +12,7 @@
 #include <utils/fileutils.h>
 #include <utils/qtcprocess.h>
 
-#include <QDir>
+#include <QtCore5Compat/QTextCodec>
 
 namespace Squish {
 namespace Internal {
@@ -187,13 +187,13 @@ Core::IDocument::OpenResult ObjectsMapDocument::openImpl(QString *error,
     if (fileName.isEmpty())
         return OpenResult::CannotHandle;
 
-    QString text;
+    QByteArray text;
     if (realFileName.fileName() == "objects.map") {
         Utils::FileReader reader;
         if (!reader.fetch(realFileName, QIODevice::Text, error))
             return OpenResult::ReadError;
 
-        text = QString::fromLocal8Bit(reader.data());
+        text = reader.data();
     } else {
         const Utils::FilePath base = SquishPlugin::squishSettings()->squishPath.filePath();
         if (base.isEmpty()) {
@@ -212,11 +212,12 @@ Core::IDocument::OpenResult ObjectsMapDocument::openImpl(QString *error,
         Utils::QtcProcess objectMapReader;
         objectMapReader.setCommand({exe, {"--scriptMap", "--mode", "read",
                                           "--scriptedObjectMapPath", realFileName.toUserOutput()}});
+        objectMapReader.setCodec(QTextCodec::codecForName("UTF-8"));
         objectMapReader.start();
         objectMapReader.waitForFinished();
-        text = objectMapReader.cleanedStdOut();
+        text = objectMapReader.cleanedStdOut().toUtf8();
     }
-    if (!setContents(text.toUtf8())) {
+    if (!setContents(text)) {
         if (error)
             error->append(Tr::tr("Failure while parsing objects.map content."));
         return OpenResult::ReadError;
diff --git a/src/plugins/squish/objectsmapeditorwidget.cpp b/src/plugins/squish/objectsmapeditorwidget.cpp
index dd981124b91..50f92e46242 100644
--- a/src/plugins/squish/objectsmapeditorwidget.cpp
+++ b/src/plugins/squish/objectsmapeditorwidget.cpp
@@ -346,7 +346,7 @@ void ObjectsMapEditorWidget::onPropertiesContentModified(const QString &text)
 
     const QModelIndex &idx = m_objMapFilterModel->mapToSource(selected.first());
     if (auto item = static_cast<ObjectsMapTreeItem *>(m_document->model()->itemForIndex(idx)))
-        item->setPropertiesContent(text.toLocal8Bit().trimmed());
+        item->setPropertiesContent(text.toUtf8().trimmed());
 }
 
 void ObjectsMapEditorWidget::onJumpToSymbolicNameClicked()
diff --git a/src/plugins/squish/objectsmaptreeitem.cpp b/src/plugins/squish/objectsmaptreeitem.cpp
index 4338181be3b..79c0c27eaea 100644
--- a/src/plugins/squish/objectsmaptreeitem.cpp
+++ b/src/plugins/squish/objectsmaptreeitem.cpp
@@ -130,19 +130,20 @@ bool ObjectsMapTreeItem::parseProperties(const QByteArray &properties)
     if (properties.isEmpty() || properties.at(0) != '{')
         return false;
 
+    QString p = QString::fromUtf8(properties);
     ParseState state = None;
-    QByteArray name;
-    QByteArray value;
-    QByteArray oper;
+    QString name;
+    QString value;
+    QString oper;
     bool masquerading = false;
-    for (char c : properties) {
+    for (QChar c : p) {
         if (masquerading) {
             value.append('\\').append(c);
             masquerading = false;
             continue;
         }
 
-        switch (c) {
+        switch (c.unicode()) {
         case '=':
             if (state == Value) {
                 value.append(c);
@@ -172,7 +173,7 @@ bool ObjectsMapTreeItem::parseProperties(const QByteArray &properties)
             } else if (state == Value) {
                 state = None;
                 Property prop;
-                if (!prop.set(QLatin1String(name), QLatin1String(oper), QLatin1String(value))) {
+                if (!prop.set(name, oper, value)) {
                     propertyRoot->removeChildren();
                     return false;
                 }
@@ -214,7 +215,7 @@ bool ObjectsMapTreeItem::parseProperties(const QByteArray &properties)
             }
             break;
         default:
-            if (QChar::isSpace(c)) {
+            if (c.isSpace()) {
                 if (state == Value) {
                     value.append(c);
                 } else if (state == Name) {
diff --git a/src/plugins/squish/squish.qbs b/src/plugins/squish/squish.qbs
index c0026e7e562..4c74c6466fc 100644
--- a/src/plugins/squish/squish.qbs
+++ b/src/plugins/squish/squish.qbs
@@ -10,6 +10,7 @@ QtcPlugin {
     Depends { name: "Utils" }
 
     Depends { name: "Qt.widgets" }
+    Depends { name: "Qt.core5compat" }
 
     files: [
         "deletesymbolicnamedialog.cpp",