diff --git a/src/qudi/gui/terascan/terascan_gui.py b/src/qudi/gui/terascan/terascan_gui.py
index caa70ca..61bf4f7 100644
--- a/src/qudi/gui/terascan/terascan_gui.py
+++ b/src/qudi/gui/terascan/terascan_gui.py
@@ -84,6 +84,7 @@ def on_activate(self):
         # create the main window
         self._mw = TerascanMainWindow()
         # ← populate start/stop λ in nm from the logic’s µm values
+        # TODO: Should I do this with a signal from the logic instead?
         logic = self._terascan_logic()
         self._mw.start_wavelength.setValue(logic.get_start_wavelength())
         self._mw.stop_wavelength.setValue(logic.get_stop_wavelength())
@@ -281,10 +282,10 @@ def __init__(self, *args, **kwargs):
         self._statusbar.addWidget(self._progress_bar)
 
         # widgets
-        self.start_wavelength_label = QtWidgets.QLabel('Start Wavelength (um)')
+        self.start_wavelength_label = QtWidgets.QLabel('Start Wavelength (nm)')
         self.start_wavelength = _spinbox()
 
-        self.stop_wavelength_label = QtWidgets.QLabel('Stop Wavelength (um)')
+        self.stop_wavelength_label = QtWidgets.QLabel('Stop Wavelength (nm)')
         self.stop_wavelength = _spinbox()
 
         self.scan_rate_label = QtWidgets.QLabel('Scan Rate')