diff --git a/spacy/syntax/parser.pyx b/spacy/syntax/parser.pyx
index 740e86025..e36d10a38 100644
--- a/spacy/syntax/parser.pyx
+++ b/spacy/syntax/parser.pyx
@@ -1,5 +1,4 @@
 # cython: profile=True
-# cython: experimental_cpp_class_def=True
 """
 MALT-style dependency parser
 """