diff --git a/python/cnghttp2.pxd b/python/cnghttp2.pxd
index 9fefc832..9252d4c8 100644
--- a/python/cnghttp2.pxd
+++ b/python/cnghttp2.pxd
@@ -53,11 +53,16 @@ cdef extern from 'nghttp2/nghttp2.h':
         NGHTTP2_PUSH_PROMISE
         NGHTTP2_GOAWAY
 
+    ctypedef enum nghttp2_nv_flag:
+        NGHTTP2_NV_FLAG_NONE
+        NGHTTP2_NV_FLAG_NO_INDEX
+
     ctypedef struct nghttp2_nv:
         uint8_t *name
         uint8_t *value
         uint16_t namelen
         uint16_t valuelen
+        uint8_t flags
 
     ctypedef enum nghttp2_settings_id:
         SETTINGS_HEADER_TABLE_SIZE
@@ -146,6 +151,7 @@ cdef extern from 'nghttp2/nghttp2.h':
          const nghttp2_frame *frame,
          const uint8_t *name, size_t namelen,
          const uint8_t *value, size_t valuelen,
+         uint8_t flags,
          void *user_data)
 
     ctypedef int (*nghttp2_on_frame_send_callback)\
diff --git a/python/nghttp2.pyx b/python/nghttp2.pyx
index 9741619c..441e84b1 100644
--- a/python/nghttp2.pyx
+++ b/python/nghttp2.pyx
@@ -112,6 +112,7 @@ cdef class HDDeflater:
             nvap[0].namelen = len(k)
             nvap[0].value = v
             nvap[0].valuelen = len(v)
+            nvap[0].flags = cnghttp2.NGHTTP2_NV_FLAG_NONE
             nvap += 1
 
         cdef cnghttp2.nghttp2_bufs bufs
@@ -294,6 +295,7 @@ cdef size_t _make_nva(cnghttp2.nghttp2_nv **nva_ptr, headers):
         nva[i].namelen = len(k)
         nva[i].value = v
         nva[i].valuelen = len(v)
+        nva[i].flags = cnghttp2.NGHTTP2_NV_FLAG_NONE
 
     nva_ptr[0] = nva
 
@@ -303,6 +305,7 @@ cdef int server_on_header(cnghttp2.nghttp2_session *session,
                           const cnghttp2.nghttp2_frame *frame,
                           const uint8_t *name, size_t namelen,
                           const uint8_t *value, size_t valuelen,
+                          uint8_t flags,
                           void *user_data):
     cdef http2 = <_HTTP2SessionCore>user_data