diff --git a/spacy/en/attrs.pxd b/spacy/en/attrs.pxd
index ab0365738..a7a209ce8 100644
--- a/spacy/en/attrs.pxd
+++ b/spacy/en/attrs.pxd
@@ -1,5 +1,5 @@
 from ..attrs cimport FLAG0, FLAG1, FLAG2, FLAG3, FLAG4, FLAG5, FLAG6, FLAG7
-from ..attrs cimport FLAG8, FLAG9
+from ..attrs cimport FLAG8, FLAG9, FLAG10
 from ..attrs cimport SIC as _SIC
 from ..attrs cimport SHAPE as _SHAPE
 from ..attrs cimport NORM1 as _NORM1
@@ -22,6 +22,7 @@ cpdef enum:
     IS_UPPER = FLAG7
     LIKE_URL = FLAG8
     LIKE_NUM = FLAG9
+    IS_STOP = FLAG10
 
     SIC = _SIC
     SHAPE = _SHAPE