diff --git a/.cspell.json b/.cspell.json
index 219f58e..15846a2 100644
--- a/.cspell.json
+++ b/.cspell.json
@@ -52,6 +52,7 @@
     "colorbar",
     "commitlint",
     "concat",
+    "costheta",
     "difflib",
     "docnb",
     "elif",
diff --git a/docs/Lc2ppiK.json b/docs/Lc2ppiK.json
index 45d7416..01479b2 100644
--- a/docs/Lc2ppiK.json
+++ b/docs/Lc2ppiK.json
@@ -742,11 +742,11 @@
       "variables": [
         {
           "node": [3, 1],
-          "mass_angles": ["m_31", "phi_31", "cos_theta_31"]
+          "mass_phi_costheta": ["m_31", "phi_31", "cos_theta_31"]
         },
         {
           "node": [[3, 1], 2],
-          "mass_angles": ["m_31_2", "phi_31_2", "cos_theta_31_2"]
+          "mass_phi_costheta": ["m_31_2", "phi_31_2", "cos_theta_31_2"]
         }
       ],
       "parameters": []