diff --git a/include/ntapi/ntapi.h b/include/ntapi/ntapi.h
index 21af579..f330283 100644
--- a/include/ntapi/ntapi.h
+++ b/include/ntapi/ntapi.h
@@ -470,6 +470,7 @@ typedef struct _ntapi_vtbl {
 	ntapi_tt_sync_block_server_lock *		tt_sync_block_server_lock;
 	ntapi_tt_sync_block_unlock *			tt_sync_block_unlock;
 	ntapi_tt_sync_block_invalidate *		tt_sync_block_invalidate;
+	ntapi_tt_sync_block_discard *			tt_sync_block_discard;
 	ntapi_tt_wait_for_dummy_event *			tt_wait_for_dummy_event;
 
 	/* nt_port.h */
diff --git a/src/internal/ntapi.c b/src/internal/ntapi.c
index 6559b5b..cf04ddc 100644
--- a/src/internal/ntapi.c
+++ b/src/internal/ntapi.c
@@ -235,6 +235,7 @@ static int32_t __fastcall __ntapi_init_once(ntapi_vtbl ** pvtbl)
 	__ntapi->tt_sync_block_server_lock 			= __ntapi_tt_sync_block_server_lock;
 	__ntapi->tt_sync_block_unlock 				= __ntapi_tt_sync_block_unlock;
 	__ntapi->tt_sync_block_invalidate 			= __ntapi_tt_sync_block_invalidate;
+	__ntapi->tt_sync_block_discard 				= __ntapi_tt_sync_block_discard;
 
 	/* nt_port.h */
 	__ntapi->csr_port_handle 				= __ntapi_csr_port_handle;
diff --git a/src/internal/ntapi_fnapi.h b/src/internal/ntapi_fnapi.h
index 6a1f14c..6a087f2 100644
--- a/src/internal/ntapi_fnapi.h
+++ b/src/internal/ntapi_fnapi.h
@@ -123,6 +123,7 @@ ntapi_tt_sync_block_lock			__ntapi_tt_sync_block_lock;
 ntapi_tt_sync_block_server_lock			__ntapi_tt_sync_block_server_lock;
 ntapi_tt_sync_block_unlock			__ntapi_tt_sync_block_unlock;
 ntapi_tt_sync_block_invalidate			__ntapi_tt_sync_block_invalidate;
+ntapi_tt_sync_block_discard			__ntapi_tt_sync_block_discard;
 
 /* nt_port.h */
 ntapi_tt_port_guid_from_type			__ntapi_tt_port_guid_from_type;