diff --git a/README.md b/README.md
index bd264de..85ee933 100644
--- a/README.md
+++ b/README.md
@@ -69,6 +69,7 @@ This is not a comprehensive list, but includes the main variables you have to th
 | Variable                                       | Description                                                                                                                                      |
 | ---------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------ |
 | `server.policyRepoUrl`                         | Git repository holding policy code (& optionally policy data) to be tracked by OPAL                                                              |
+| `server.policyRepoMainBranch`                  | sets OPAL_POLICY_REPO_MAIN_BRANCH which defaults to `master`                                                                                     |
 | `server.dataConfigSources`                     | Data sources to be published to clients (and their managed OPAs)                                                                                 |
 | `server.dataConfigSources.config.entries`      | Static list of data source entries (See [OPAL Docs](https://docs.opal.ac/getting-started/running-opal/run-opal-server/data-sources))             |
 | `server.dataConfigSources.external_source_url` | URL to dynamically fetch data sources entries from (See [OPAL Docs](https://docs.opal.ac/tutorials/configure_external_data_sources))             |
diff --git a/values.schema.json b/values.schema.json
index f138b52..2e4aafe 100644
--- a/values.schema.json
+++ b/values.schema.json
@@ -135,7 +135,7 @@
           "type": ["null", "string"], "title": "policy clone path","default": null
         },
         "policyRepoMainBranch": {
-          "type": ["null", "string"], "title": "policy main branch","default": null
+          "type": ["null", "string"], "title": "sets OPAL_POLICY_REPO_MAIN_BRANCH which defaults to master","default": null
         },
         "pollingInterval": {
           "type": "integer", "title": "polling interval (sec)", "default": 30
diff --git a/values.yaml b/values.yaml
index dd6b9ff..aef0a13 100644
--- a/values.yaml
+++ b/values.yaml
@@ -15,7 +15,7 @@ server:
   policyRepoUrl: "https://github.com/permitio/opal-example-policy-repo"
   policyRepoSshKey: null
   policyRepoClonePath: null
-  policyRepoMainBranch: null
+  policyRepoMainBranch: null # sets OPAL_POLICY_REPO_MAIN_BRANCH which defaults to master
   pollingInterval: 30
   dataConfigSources:
     # Option #1 - No data sources