diff --git a/src/one-body-sample.cc b/src/one-body-sample.cc
index 860ed695c0f877089648ca44cd06c1163b562614..06d8b63f62a553edeb4961afc90388922c6c5052 100644
--- a/src/one-body-sample.cc
+++ b/src/one-body-sample.cc
@@ -205,11 +205,11 @@ class DecayingExponential {
 
 double compute_state_update_bisection(double h, double unorm, double L,
                                       double old_state) {
-  MyDirectionalConvexFunction<DecayingExponential> const Jplus(
+  MyDirectionalConvexFunction<DecayingExponential> const J(
       1.0 / h, (old_state - unorm / L) / h, DecayingExponential(), 0, 1);
   int bisectionsteps = 0;
-  Bisection const bisection(0.0, 1.0, 1e-12, true, 0); // TODO
-  return bisection.minimize(Jplus, 0.0, 0.0, bisectionsteps);
+  Bisection const bisection(0.0, 1.0, 1e-12, true, 0);    // TODO
+  return bisection.minimize(J, 0.0, 0.0, bisectionsteps); // TODO
 }
 
 double compute_state_update_lambert(double h, double unorm, double L,