diff --git a/jplephem/pck.py b/jplephem/pck.py
index d0f1d44..8c1d75c 100644
--- a/jplephem/pck.py
+++ b/jplephem/pck.py
@@ -153,8 +153,6 @@ class Segment(object):
         # Chebyshev polynomial.  We accumulate results starting with the
         # final coefficient to retain accuracy for as long as possible.
 
-        jmax = coefficients.shape[0]
-
         s = 2.0 * offset / intlen - 1.0
         s2 = 2.0 * s
 
diff --git a/jplephem/spk.py b/jplephem/spk.py
index 5f3c371..8ee7d78 100644
--- a/jplephem/spk.py
+++ b/jplephem/spk.py
@@ -239,8 +239,6 @@ class Segment(BaseSegment):
         # Chebyshev polynomial.  We accumulate results starting with the
         # final coefficient to retain accuracy for as long as possible.
 
-        jmax = coefficients.shape[0]
-
         s = 2.0 * offset / intlen - 1.0
         s2 = 2.0 * s