diff --git a/spacy/structs.pxd b/spacy/structs.pxd
index f7f8b23d3..b33b24db3 100644
--- a/spacy/structs.pxd
+++ b/spacy/structs.pxd
@@ -51,6 +51,7 @@ cdef struct TokenC:
     int sense
     int head
     int dep
+    bint sent_end
     uint32_t l_kids
     uint32_t r_kids