diff --git a/src/lib/fex/lexer.cpp b/src/lib/fex/lexer.cpp
index e8545f2e..e6591570 100644
--- a/src/lib/fex/lexer.cpp
+++ b/src/lib/fex/lexer.cpp
@@ -164,7 +164,7 @@ namespace fex
         // Note: Using QFile instead of ifstream to handle encoding differences between platforms
         //       (specifically to handle accented characters on Windows)
         QFile file(path);
-        file.open(QIODevice::ReadOnly);
+        if (!file.open(QIODevice::ReadOnly)) return Lex();
 
         const QByteArray data = file.readAll();
 
diff --git a/src/log.cpp b/src/log.cpp
index 7eaaec26..574b6d7f 100644
--- a/src/log.cpp
+++ b/src/log.cpp
@@ -189,7 +189,7 @@ void logInit() {
         dir.mkpath(settingsPath);
     Log::path = dir.absoluteFilePath(QStringLiteral("porymap.log"));
     Log::file.setFileName(Log::path);
-    Log::file.open(QIODevice::WriteOnly | QIODevice::Append);
+    if (!Log::file.open(QIODevice::WriteOnly | QIODevice::Append)) return;
     Log::textStream.setDevice(&Log::file);
 
     QObject::connect(&Log::displayClearTimer, &QTimer::timeout, [=] {
diff --git a/src/mainwindow.cpp b/src/mainwindow.cpp
index 3519827b..2dfb3237 100644
--- a/src/mainwindow.cpp
+++ b/src/mainwindow.cpp
@@ -708,9 +708,9 @@ void MainWindow::restoreWindowState() {
 }
 
 void MainWindow::setTheme(QString theme) {
-    QFile File(QString(":/themes/%1.qss").arg(theme));
-    File.open(QFile::ReadOnly);
-    QString stylesheet = QLatin1String(File.readAll());
+    QFile file(QString(":/themes/%1.qss").arg(theme));
+    if (!file.open(QFile::ReadOnly)) return;
+    QString stylesheet = QLatin1String(file.readAll());
 
     stylesheet.append(QString("QWidget { %1 } ").arg(Util::toStylesheetString(porymapConfig.applicationFont)));
     stylesheet.append(QString("MapTree { %1 } ").arg(Util::toStylesheetString(porymapConfig.mapListFont)));