diff --git a/qspace.py b/qspace.py
index 5eede15..78f0620 100644
--- a/qspace.py
+++ b/qspace.py
@@ -179,7 +179,7 @@ class QSpace1D(Adjustable):
 h = 6.62607015e-34 # J s
 c = 299792458 # m / s
 e = 1.60217663e-19 # C
-f = h * c / e * 1e-3 * 1e9 *1e-3 # E [eV] = f / lambda [nm]
+f = h * c / e * 1e-3 * 1e9 *1e3# E [eV] = f / lambda [nm]
 
 
 class Wavelength(Adjustable):