diff --git a/spacy/syntax/nn_parser.pyx b/spacy/syntax/nn_parser.pyx
index 218a9dd67..40384fe06 100644
--- a/spacy/syntax/nn_parser.pyx
+++ b/spacy/syntax/nn_parser.pyx
@@ -57,6 +57,7 @@ cdef class Parser:
                             cfg.get('subword_features', True))
         conv_depth = util.env_opt('conv_depth', cfg.get('conv_depth', 4))
         conv_window = util.env_opt('conv_window', cfg.get('conv_depth', 1))
+        t2v_pieces = util.env_opt('cnn_maxout_pieces', cfg.get('cnn_maxout_pieces', 3))
         bilstm_depth = util.env_opt('bilstm_depth', cfg.get('bilstm_depth', 0))
         self_attn_depth = util.env_opt('self_attn_depth', cfg.get('self_attn_depth', 0))
         if depth not in (0, 1):
@@ -73,6 +74,7 @@ cdef class Parser:
         tok2vec = Tok2Vec(token_vector_width, embed_size,
                           conv_depth=conv_depth,
                           conv_window=conv_window,
+                          cnn_maxout_pieces=t2v_pieces,
                           subword_features=subword_features,
                           pretrained_vectors=pretrained_vectors,
                           bilstm_depth=bilstm_depth,
@@ -101,7 +103,8 @@ cdef class Parser:
             'self_attn_depth': self_attn_depth,
             'conv_depth': conv_depth,
             'conv_window': conv_window,
-            'embed_size': embed_size
+            'embed_size': embed_size,
+            'cnn_maxout_pieces': t2v_pieces
         }
         return ParserModel(tok2vec, lower, upper), cfg