diff --git a/force.py b/force.py
index 941ac0d..79cae25 100644
--- a/force.py
+++ b/force.py
@@ -10,7 +10,7 @@ force_function = UFuncWrapper(0, c)
 potential_function = UFuncWrapper(2, c)
 
 # Plot the force and potential.
-r = np.arange(0, 100, 0.02, dtype=np.float16)
+r = np.arange(0.01, 100, 0.02, dtype=np.float16)
 f, = plt.plot(r, force_function(r), label="force")
 p, = plt.plot(r, potential_function(r), label="potential")
 plt.legend(handles=[f, p])