diff --git a/colorspace.py b/colorspace.py
index ed5c1c1..afbabe6 100644
--- a/colorspace.py
+++ b/colorspace.py
@@ -499,11 +499,11 @@ def gamma_correct(c):
 def vectorized_gamma_correct(array):
 	return np.where(array <= 0.0031308, 12.92*array, 1.055*np.power(array, 1/2.4)-0.055)
 
-def wavelength2XYZ(wavelength, intensity):
+def wavelength2XYZ(wavelength):
 	X = np.interp(wavelength, data_wavelength, data_x, 0, 0)
 	Y = np.interp(wavelength, data_wavelength, data_y, 0, 0)
 	Z = np.interp(wavelength, data_wavelength, data_z, 0, 0)
-	return intensity*np.array([X,Y,Z])
+	return np.array([X,Y,Z])
 
 def spectral2XYZ(spectral):
 	X = np.dot(spectral, data_x)