diff --git a/src/lib/app/mainapplication.cpp b/src/lib/app/mainapplication.cpp
index 8ecdb0849..a6b6dc66e 100644
--- a/src/lib/app/mainapplication.cpp
+++ b/src/lib/app/mainapplication.cpp
@@ -121,7 +121,7 @@ MainApplication::MainApplication(int &argc, char** argv)
 #if defined(QZ_WS_X11) && !defined(NO_SYSTEM_DATAPATH)
     DATADIR = USE_DATADIR;
 #else
-    DATADIR = qApp->applicationDirPath() + "/";
+    DATADIR = qApp->applicationDirPath() + QDir::separator();
 #endif
 
 #ifdef Q_OS_MAC
@@ -250,11 +250,11 @@ MainApplication::MainApplication(int &argc, char** argv)
             m_activeProfil = PROFILEDIR + "profiles/default/";
         }
         else {
-            m_activeProfil = PROFILEDIR + "profiles/" + settings.value("Profiles/startProfile", "default").toString() + "/";
+            m_activeProfil = PROFILEDIR + "profiles/" + settings.value("Profiles/startProfile", "default").toString() + QDir::separator();
         }
     }
     else {
-        m_activeProfil = PROFILEDIR + "profiles/" + startProfile + "/";
+        m_activeProfil = PROFILEDIR + "profiles/" + startProfile + QDir::separator();
     }
 
     ProfileUpdater u(m_activeProfil);
@@ -685,7 +685,7 @@ void MainApplication::loadTheme(const QString &name)
                << THEMESDIR;
 
     foreach (const QString &path, themePaths) {
-        const QString &theme = path + name + "/";
+        const QString &theme = path + name + QDir::separator();
         if (QFile::exists(theme + "main.css")) {
             m_activeThemePath = theme;
             break;
@@ -694,7 +694,7 @@ void MainApplication::loadTheme(const QString &name)
 
     if (m_activeThemePath.isEmpty()) {
         qWarning("Cannot load theme '%s'!", qPrintable(name));
-        m_activeThemePath = THEMESDIR + DEFAULT_THEME_NAME + "/";
+        m_activeThemePath = THEMESDIR + DEFAULT_THEME_NAME + QDir::separator();
     }
 
     QFile cssFile(m_activeThemePath + "main.css");
diff --git a/src/lib/preferences/preferences.cpp b/src/lib/preferences/preferences.cpp
index 307b19cd0..13d5a11ee 100644
--- a/src/lib/preferences/preferences.cpp
+++ b/src/lib/preferences/preferences.cpp
@@ -774,7 +774,7 @@ void Preferences::createProfile()
         return;
     }
     QDir dir(mApp->PROFILEDIR + "profiles/");
-    if (QDir(dir.absolutePath() + "/" + name).exists()) {
+    if (QDir(dir.absolutePath() + QDir::separator() + name).exists()) {
         QMessageBox::warning(this, tr("Error!"), tr("This profile already exists!"));
         return;
     }
diff --git a/src/lib/preferences/thememanager.cpp b/src/lib/preferences/thememanager.cpp
index 819d0175e..ab8ee73ab 100644
--- a/src/lib/preferences/thememanager.cpp
+++ b/src/lib/preferences/thememanager.cpp
@@ -50,7 +50,7 @@ ThemeManager::ThemeManager(QWidget* parent, Preferences* preferences)
         QDir dir(path);
         QStringList list = dir.entryList(QDir::AllDirs | QDir::NoDotAndDotDot);
         foreach (const QString &name, list) {
-            Theme themeInfo = parseTheme(dir.absoluteFilePath(name) + "/", name);
+            Theme themeInfo = parseTheme(dir.absoluteFilePath(name) + QDir::separator(), name);
             if (!themeInfo.isValid) {
                 continue;
             }