diff --git a/pyerrors/correlators.py b/pyerrors/correlators.py
index 9f2cb197..95eadf74 100644
--- a/pyerrors/correlators.py
+++ b/pyerrors/correlators.py
@@ -916,7 +916,7 @@ class Corr:
         if self.N != 1:
             raise Exception("Correlator needs to be projected first.")
 
-        mc_names = list(set([item for sublist in [o[0].mc_names for o in self.content if o is not None] for item in sublist]))
+        mc_names = list(set([item for sublist in [sum(map(o[0].e_content.get, o[0].mc_names), []) for o in self.content if o is not None] for item in sublist]))
         x0_vals = [n for (n, o) in zip(np.arange(self.T), self.content) if o is not None]
 
         for name in mc_names:
diff --git a/tests/correlators_test.py b/tests/correlators_test.py
index c4980a7e..49332254 100644
--- a/tests/correlators_test.py
+++ b/tests/correlators_test.py
@@ -498,7 +498,8 @@ def test_corr_vector_operations():
 
 def test_spaghetti_plot():
     corr = _gen_corr(12, 50)
-    corr += pe.pseudo_Obs(0.0, 0.1, 'another_ensemble')
+    corr += pe.pseudo_Obs(0.0, 0.1, 'another_ensemble|r0')
+    corr += pe.pseudo_Obs(0.0, 0.1, 'another_ensemble|r1')
     corr += pe.cov_Obs(0.0, 0.01 ** 2, 'covobs')
 
     corr.spaghetti_plot(True)