diff --git a/spacy/structs.pxd b/spacy/structs.pxd
index a423af8b0..6a15b8951 100644
--- a/spacy/structs.pxd
+++ b/spacy/structs.pxd
@@ -48,6 +48,13 @@ cdef struct Entity:
     int label
 
 
+cdef struct Constituent:
+    int head
+    int start
+    int end
+    int label
+
+
 cdef struct TokenC:
     const LexemeC* lex
     Morphology morph
@@ -65,6 +72,9 @@ cdef struct TokenC:
     uint32_t l_edge
     uint32_t r_edge
 
+    int attach_order
+    int ctnt_label
+
     int ent_iob
     int ent_type
 
diff --git a/spacy/syntax/_state.pxd b/spacy/syntax/_state.pxd
index 59e1c8c0a..a1f17b94c 100644
--- a/spacy/syntax/_state.pxd
+++ b/spacy/syntax/_state.pxd
@@ -2,13 +2,14 @@ from libc.stdint cimport uint32_t
 
 from cymem.cymem cimport Pool
 
-from ..structs cimport TokenC, Entity
+from ..structs cimport TokenC, Entity, Constituent
 
 
 cdef struct State:
     TokenC* sent
     int* stack
     Entity* ent
+    Constituent* ctnt
     int i
     int sent_len
     int stack_len
diff --git a/spacy/syntax/_state.pyx b/spacy/syntax/_state.pyx
index 07d55ad98..2acd51670 100644
--- a/spacy/syntax/_state.pyx
+++ b/spacy/syntax/_state.pyx
@@ -2,7 +2,7 @@ from libc.string cimport memmove, memcpy
 from cymem.cymem cimport Pool
 
 from ..lexeme cimport EMPTY_LEXEME
-from ..structs cimport TokenC, Entity
+from ..structs cimport TokenC, Entity, Constituent
 
 
 DEF PADDING = 5
@@ -137,10 +137,12 @@ cdef int count_right_kids(const TokenC* head) nogil:
 cdef State* new_state(Pool mem, const TokenC* sent, const int sent_len) except NULL:
     cdef int padded_len = sent_len + PADDING + PADDING
     cdef State* s = <State*>mem.alloc(1, sizeof(State))
+    s.ctnt = <Constituent*>mem.alloc(padded_len, sizeof(Constituent))
     s.ent = <Entity*>mem.alloc(padded_len, sizeof(Entity))
     s.stack = <int*>mem.alloc(padded_len, sizeof(int))
     for i in range(PADDING):
         s.stack[i] = -1
+    s.ctnt += (PADDING -1)
     s.stack += (PADDING - 1)
     s.ent += (PADDING - 1)
     assert s.stack[0] == -1