diff --git a/clmm/redshift/tools.py b/clmm/redshift/tools.py
index b818133d9..d934dd754 100644
--- a/clmm/redshift/tools.py
+++ b/clmm/redshift/tools.py
@@ -2,7 +2,6 @@
 import warnings
 import numpy as np
 from scipy.integrate import simpson
-from scipy.interpolate import interp1d
 
 import qp