diff --git a/spacy/kb/kb.pxd b/spacy/kb/kb.pxd
index c7652bca8..263469546 100644
--- a/spacy/kb/kb.pxd
+++ b/spacy/kb/kb.pxd
@@ -2,6 +2,7 @@
 
 from cymem.cymem cimport Pool
 from libc.stdint cimport int64_t
+
 from ..vocab cimport Vocab