diff --git a/src/res/ext/MNI152.json b/src/res/ext/MNI152.json
index e4765a39c94303d0399d731f5dd3e2eeec4f900c..fd2644c03ad6cc545934b38dc04b7ea3e4b9b192 100644
--- a/src/res/ext/MNI152.json
+++ b/src/res/ext/MNI152.json
@@ -9,6 +9,7 @@
     {
       "name": "JuBrain Cytoarchitectonic Atlas",
       "ngId": "jubrain mni152 v18 left",
+      "auxillaryMeshIndices": [ 65535 ],
       "properties": {
         "version": "1.0",
         "description": "not yet",
diff --git a/src/res/ext/colin.json b/src/res/ext/colin.json
index fbb7a040b6b7a2a8b56d2af50b4bdfcf87447061..cf46f53ef0dc35cae62852cd238f03cd123e570f 100644
--- a/src/res/ext/colin.json
+++ b/src/res/ext/colin.json
@@ -9,6 +9,7 @@
     {
       "name": "JuBrain Cytoarchitectonic Atlas",
       "ngId": "jubrain colin v18 left",
+      "auxillaryMeshIndices": [ 65535 ],
       "properties": {
         "version": "1.0",
         "description": "not yet",