diff --git a/Catalog/C6_50sqdeg.py b/Catalog/C6_50sqdeg.py
index 4bf5934991d01e6c901b2306830e411930820d13..271bf9b5629e4b55a129c78f67dc6c74109b1b49 100644
--- a/Catalog/C6_50sqdeg.py
+++ b/Catalog/C6_50sqdeg.py
@@ -454,7 +454,7 @@ class Catalog(CatalogBase):
             elif obj.type == 'quasar':
                 flux = self.agn_seds[obj.agnsed_file][int(obj.qsoindex)] * 1e-17
                 flux[flux < 0] = 0.
-                wave = self.lamb_gal
+                wave = self.lamb_gal * (1.0 + obj.z)
         else:
             raise ValueError("Object type not known")
         speci = interpolate.interp1d(wave, flux)