diff --git a/columbus/observables.py b/columbus/observables.py
index b94760b..3a17994 100644
--- a/columbus/observables.py
+++ b/columbus/observables.py
@@ -353,8 +353,6 @@ class CompositionalObservable(Observable):
         o = [obs.get_observation().reshape((-1))
              for obs in self.observables]
         o = np.hstack(o)
-        import pdb
-        pdb.set_trace()
         return o
 
     def draw(self):