diff --git a/GUI/Models/Unit.cpp b/GUI/Models/Unit.cpp
index e49eab8d544d687fb0cc4ecb907f8cf2559dcb54..d40ed2da388572194d6d30bd51bab1fb8a74c767 100644
--- a/GUI/Models/Unit.cpp
+++ b/GUI/Models/Unit.cpp
@@ -63,15 +63,15 @@ QString unitAsString(const Unit& unit)
     case Unit::nanometer:
         return "nm";
     case Unit::nanometerPower2:
-        return "nm²";
+        return u8"nm\u00B2";
     case Unit::nanometerPowerMinus2:
-        return "1/nm²";
+        return u8"1/nm\u00B2";
     case Unit::angstrom:
-        return "\303\205";
+        return u8"\u00c5";
     case Unit::angstromPower2:
-        return "\303\205²";
+        return u8"\u00c5\u00B2";
     case Unit::angstromPowerMinus2:
-        return "1/\303\205²";
+        return u8"1/\u00c5\u00B2";
     case Unit::degree:
         return "°";
     case Unit::radiant:
diff --git a/GUI/Views/SampleDesigner/LayerOrientedSampleEditor.cpp b/GUI/Views/SampleDesigner/LayerOrientedSampleEditor.cpp
index 2579c15c18aa87dcc3b5f3815552c9479a57b8d6..3e26358008601339ce04c40389c4554328033baa 100644
--- a/GUI/Views/SampleDesigner/LayerOrientedSampleEditor.cpp
+++ b/GUI/Views/SampleDesigner/LayerOrientedSampleEditor.cpp
@@ -58,7 +58,7 @@ LayerOrientedSampleEditor::LayerOrientedSampleEditor(QWidget* parent)
 
     m_asAngstromAction = new QAction(this);
     m_asAngstromAction->setIcon(QIcon(":/images/unit_angstrom.svg"));
-    m_asAngstromAction->setToolTip("Use \303\205ngstrom as unit (where applicable)");
+    m_asAngstromAction->setToolTip(u8"Use \u00c5ngstrom as unit (where applicable)");
     connect(m_asAngstromAction, &QAction::toggled, this,
             &LayerOrientedSampleEditor::onUnitActionToggled);
     m_asAngstromAction->setCheckable(true);
diff --git a/GUI/mainwindow/actionmanager.cpp b/GUI/mainwindow/actionmanager.cpp
index 0058fbcb00ab3e87bbca0fcb1501fe43dbe91ca6..ef1c6494774e218dbec174ab1c9acdf945846057 100644
--- a/GUI/mainwindow/actionmanager.cpp
+++ b/GUI/mainwindow/actionmanager.cpp
@@ -264,7 +264,7 @@ void ActionManager::onAboutToShowSettingsMenu()
     };
 
     addUnitAction("Use nanometer as default unit", false);
-    addUnitAction("Use \303\205ngstrom as default unit", true);
+    addUnitAction(u8"Use \u00c5ngstrom as default unit", true);
 
     m_settingsMenu->addSeparator();