diff --git a/src/sixtypical/context.py b/src/sixtypical/context.py
index cba38f8..a92c513 100644
--- a/src/sixtypical/context.py
+++ b/src/sixtypical/context.py
@@ -35,7 +35,6 @@ class AnalysisContext(object):
         self._terminated = False
         self._gotos_encountered = set()
         self._pointer_assoc = dict()
-        self.called_routines = set()
 
         for ref in inputs:
             if self.is_constant(ref):
@@ -80,7 +79,6 @@ class AnalysisContext(object):
         c._writeable = set(self._writeable)
         c._pointer_assoc = dict(self._pointer_assoc)
         c._gotos_encountered = set(self._gotos_encountered)
-        c.called_routines = set(self.called_routines)
         return c
 
     def update_from(self, other):
@@ -96,7 +94,6 @@ class AnalysisContext(object):
         self._writeable = set(other._writeable)
         self._terminated = other._terminated
         self._pointer_assoc = dict(other._pointer_assoc)
-        self.called_routines = set(other.called_routines)
 
     def each_meaningful(self):
         for ref in self._range.keys():