diff --git a/spacy/gold.pyx b/spacy/gold.pyx
index 1e9a0194f..806ab9857 100644
--- a/spacy/gold.pyx
+++ b/spacy/gold.pyx
@@ -1,3 +1,5 @@
+# cython: profile=True
+# cython: infer_types=True
 from __future__ import unicode_literals, print_function
 
 import numpy