diff --git a/pygem/params/rbfparams.py b/pygem/params/rbfparams.py
index 10a3d95..a0014d5 100644
--- a/pygem/params/rbfparams.py
+++ b/pygem/params/rbfparams.py
@@ -85,7 +85,7 @@ def read_parameters(self, filename='parameters_rbf.prm'):
 
         ctrl_points = config.get('Control points', 'original control points')
         lines = ctrl_points.split('\n')
-        self.original_control_points = np.zeros((self.n_control_points, 3))
+        self.original_control_points = np.zeros((len(lines), 3))
         for line, i in zip(lines, list(range(0, self.n_control_points))):
             values = line.split()
             self.original_control_points[i] = np.array(