diff --git a/appletree/components/yields.py b/appletree/components/yields.py
index da473a2..927feef 100644
--- a/appletree/components/yields.py
+++ b/appletree/components/yields.py
@@ -8,6 +8,7 @@ def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
 
         self.register(apt.plugins.MonoEnergiesSpectra)
+        self.register(apt.plugins.PositionSpectra)
         self.register(apt.plugins.TotalQuanta)
         self.register(apt.plugins.EField)
         self.register(apt.plugins.ThomasImelBox)
@@ -21,6 +22,7 @@ def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
 
         self.register(apt.plugins.UniformEnergiesSpectra)
+        self.register(apt.plugins.PositionSpectra)
         self.register(apt.plugins.TotalQuanta)
         self.register(apt.plugins.EField)
         self.register(apt.plugins.ThomasImelBox)