diff --git a/docs/opentofu-migration.md b/docs/opentofu-migration.md
index 505147c..8ad18fc 100644
--- a/docs/opentofu-migration.md
+++ b/docs/opentofu-migration.md
@@ -108,6 +108,10 @@ ct ids sync --env prod --tofu-state terraform.tfstate --dry-run
 ct ids list --env prod                                    # what ct would resolve through
 ```
 
+Role definitions (`churchtools_group_role_definition`, tier 3) are read too, into
+the `group-role` section, so `{ roleDef: "…" }` references keep resolving once the
+roles leave ct's state. They are read-only here: `ct export tf` does not write them.
+
 `sync` reports every id it adds, changes or drops, and **refuses to replace a
 populated map with an empty one** — the likeliest cause of an empty read is the
 wrong workspace, and overwriting 50 working ids with nothing would break every
diff --git a/src/resolve/tfstate.ts b/src/resolve/tfstate.ts
index 7840736..de3b940 100644
--- a/src/resolve/tfstate.ts
+++ b/src/resolve/tfstate.ts
@@ -16,9 +16,13 @@ import type { IdMapEntry } from "./idMap.js";
 
 /** Terraform resource type → ct resource type, derived from the exporter's own table so the two
  *  directions cannot drift. */
-const CT_TYPE_BY_HCL_TYPE: ReadonlyMap<string, string> = new Map(
-  EXPORTABLE_TYPES.map((ctType) => [hclType(ctType), ctType] as const),
-);
+const CT_TYPE_BY_HCL_TYPE: ReadonlyMap<string, string> = new Map([
+  ...EXPORTABLE_TYPES.map((ctType) => [hclType(ctType), ctType] as const),
+  // Role definitions (`/group/roles`) are hand-written in HCL once tofu owns them, so ct never
+  // EXPORTS them (they are not in EXPORTABLE_TYPES); but a `role-def` reference still has to resolve
+  // to their ids after the entries leave ct's state. Read-only mapping: state → id map.
+  ["churchtools_group_role_definition", "group-role"] as const,
+]);
 
 export interface TfStateReadResult {
   entries: IdMapEntry[];
diff --git a/tests/tofu-id-map.test.ts b/tests/tofu-id-map.test.ts
index 9b53eef..a6d0427 100644
--- a/tests/tofu-id-map.test.ts
+++ b/tests/tofu-id-map.test.ts
@@ -105,6 +105,17 @@ describe("Resolver", () => {
     expect(await resolver.resolve(ref.campus("mainz"), "site")).toBe(0);
   });
 
+  it("resolves a role definition once it left ct's state (tier 3)", async () => {
+    // `roleDef` reads type "group-role"; after `ct state rm group-role <key>` only the map knows it.
+    const map = parseIdMap(
+      renderIdMap(HOST, [{ type: "group-role", key: "team_member", id: 7 }], "ct ids sync"),
+      ".ct/ids.json",
+      HOST,
+    );
+    const resolver = new Resolver({ client: client as never, state, desired: [], host: HOST, idMap: map });
+    expect(await resolver.resolve(ref.roleDef("team_member"), "site")).toBe(7);
+  });
+
   it("still prefers ct's own state over the map", async () => {
     // ct never stops trusting what it owns: a resource still in ct's state is ct's, and a stale map
     // entry must not overrule it.
@@ -197,6 +208,31 @@ describe("readTfState", () => {
     expect(serial).toBe(12);
   });
 
+  it("maps churchtools_group_role_definition to the group-role type", () => {
+    const { entries, unmapped } = readTfState({
+      resources: [
+        {
+          mode: "managed",
+          type: "churchtools_group_role_definition",
+          name: "team_member",
+          instances: [{ attributes: { id: "7" } }],
+        },
+        // for_each blocks stay unmapped, as for every other type.
+        {
+          mode: "managed",
+          type: "churchtools_group_role_definition",
+          name: "bulk",
+          instances: [
+            { index_key: "a", attributes: { id: "1" } },
+            { index_key: "b", attributes: { id: "2" } },
+          ],
+        },
+      ],
+    });
+    expect(entries).toEqual([{ type: "group-role", key: "team_member", id: 7 }]);
+    expect(unmapped).toEqual([]);
+  });
+
   it("takes the label as the key when no previous map recorded a relabelling", () => {
     const { entries } = readTfState(tfstate);
     expect(entries.map((e) => e.key)).toEqual(["status_unbekannt", "g_3_groupactive"]);