diff --git a/spacy/pipeline/pipes.pyx b/spacy/pipeline/pipes.pyx
index 8af76a0fb..fc077fc82 100644
--- a/spacy/pipeline/pipes.pyx
+++ b/spacy/pipeline/pipes.pyx
@@ -625,7 +625,7 @@ class Tagger(Pipe):
         serialize = OrderedDict((
             ("vocab", lambda p: self.vocab.to_disk(p)),
             ("tag_map", lambda p: srsly.write_msgpack(p, tag_map)),
-            ("model", self.model.to_disk),
+            ("model", lambda p: self.model.to_disk(p)),
             ("cfg", lambda p: srsly.write_json(p, self.cfg))
         ))
         exclude = util.get_serialization_exclude(serialize, exclude, kwargs)
@@ -1394,7 +1394,7 @@ class EntityLinker(Pipe):
         serialize["vocab"] = lambda p: self.vocab.to_disk(p)
         serialize["kb"] = lambda p: self.kb.dump(p)
         if self.model not in (None, True, False):
-            serialize["model"] = self.model.to_disk
+            serialize["model"] = lambda p: self.model.to_disk(p)
         exclude = util.get_serialization_exclude(serialize, exclude, kwargs)
         util.to_disk(path, serialize, exclude)
 
diff --git a/spacy/vectors.pyx b/spacy/vectors.pyx
index 62d176c6c..2877d2d7d 100644
--- a/spacy/vectors.pyx
+++ b/spacy/vectors.pyx
@@ -385,7 +385,7 @@ cdef class Vectors:
                 save_array(self.data, _file)
 
         serializers = OrderedDict((
-            ("vectors", save_vectors),
+            ("vectors", lambda p: save_vectors(p)),
             ("key2row", lambda p: srsly.write_msgpack(p, self.key2row))
         ))
         return util.to_disk(path, serializers, [])