diff --git a/spacy/vocab.pyx b/spacy/vocab.pyx
index 5d7bebd66..60719a9fe 100644
--- a/spacy/vocab.pyx
+++ b/spacy/vocab.pyx
@@ -227,6 +227,22 @@ cdef class Vocab:
                 lex.repvec = EMPTY_VEC
         return vec_len
 
+    property codec:
+        def __get__(self):
+            cdef Address mem
+            cdef int i
+            cdef float[:] cv_probs
+            if self._codec is not None:
+                return self._codec
+            else:
+                mem = Address(len(self), sizeof(float))
+                probs = <float*>mem.ptr
+                for i in range(len(self)):
+                    probs[i] = <float>c_exp(self.lexemes[i].prob)
+                cv_probs = <float[:len(self)]>probs
+                self._codec = HuffmanCodec(cv_probs, 0)
+                return self._codec
+
 
 def write_binary_vectors(in_loc, out_loc):
     cdef _CFile out_file = _CFile(out_loc, 'wb')