diff --git a/spacy/syntax/ner.pyx b/spacy/syntax/ner.pyx
index d8c748099..5c4e42176 100644
--- a/spacy/syntax/ner.pyx
+++ b/spacy/syntax/ner.pyx
@@ -219,30 +219,28 @@ cdef class BiluoPushDown(TransitionSystem):
             raise Exception(move)
         return t
 
-    #def add_action(self, int action, label_name):
-    #    cdef attr_t label_id
-    #    if not isinstance(label_name, (int, long)):
-    #        label_id = self.strings.add(label_name)
-    #    else:
-    #        label_id = label_name
-    #    if action == OUT and label_id != 0:
-    #        return
-    #    if action == MISSING or action == ISNT:
-    #        return
-    #    # Check we're not creating a move we already have, so that this is
-    #    # idempotent
-    #    for trans in self.c[:self.n_moves]:
-    #        if trans.move == action and trans.label == label_id:
-    #            return 0
-    #    if self.n_moves >= self._size:
-    #        self._size *= 2
-    #        self.c = <Transition*>self.mem.realloc(self.c, self._size * sizeof(self.c[0]))
-    #    self.c[self.n_moves] = self.init_transition(self.n_moves, action, label_id)
-    #    assert self.c[self.n_moves].label == label_id
-    #    self.n_moves += 1
-    #    return 1
-
-
+    def add_action(self, int action, label_name):
+        cdef attr_t label_id
+        if not isinstance(label_name, (int, long)):
+            label_id = self.strings.add(label_name)
+        else:
+            label_id = label_name
+        if action == OUT and label_id != 0:
+            return
+        if action == MISSING or action == ISNT:
+            return
+        # Check we're not creating a move we already have, so that this is
+        # idempotent
+        for trans in self.c[:self.n_moves]:
+            if trans.move == action and trans.label == label_id:
+                return 0
+        if self.n_moves >= self._size:
+            self._size *= 2
+            self.c = <Transition*>self.mem.realloc(self.c, self._size * sizeof(self.c[0]))
+        self.c[self.n_moves] = self.init_transition(self.n_moves, action, label_id)
+        assert self.c[self.n_moves].label == label_id
+        self.n_moves += 1
+        return 1
 
     cdef int initialize_state(self, StateC* st) nogil:
         # This is especially necessary when we use limited training data.