diff --git a/trex.org b/trex.org
index e007d689..463b26d6 100644
--- a/trex.org
+++ b/trex.org
@@ -123,11 +123,12 @@
 
 
    #+NAME: pbc
-   | Variable      | Type    | Dimensions             | Description             |
-   |---------------+---------+------------------------+-------------------------|
-   | ~periodic~    | ~int~   |                        | ~1~: true or ~0~: false |
-   | ~k_point_num~ | ~dim~   |                        | Number of $k$-points    |
-   | ~k_point~     | ~float~ | ~(3, pbc.k_point_num)~ | $k$-point sampling      |
+   | Variable         | Type    | Dimensions             | Description             |
+   |------------------+---------+------------------------+-------------------------|
+   | ~periodic~       | ~int~   |                        | ~1~: true or ~0~: false |
+   | ~k_point_num~    | ~dim~   |                        | Number of $k$-points    |
+   | ~k_point~        | ~float~ | ~(3, pbc.k_point_num)~ | $k$-point sampling      |
+   | ~k_point_weight~ | ~float~ | ~(pbc.k_point_num)~    | $k$-point weight        |
 
    #+CALL: json(data=pbc, title="pbc")
 
@@ -135,9 +136,10 @@
    :results:
    #+begin_src python :tangle trex.json
        "pbc": {
-              "periodic" : [ "int"  , []                         ]
-         , "k_point_num" : [ "dim"  , []                         ]
-         ,     "k_point" : [ "float", [ "pbc.k_point_num", "3" ] ]
+                 "periodic" : [ "int"  , []                         ]
+         ,    "k_point_num" : [ "dim"  , []                         ]
+         ,        "k_point" : [ "float", [ "pbc.k_point_num", "3" ] ]
+         , "k_point_weight" : [ "float", [ "pbc.k_point_num" ]      ]
        } ,
    #+end_src
    :end: