diff --git a/modules/openapi-generator/src/main/resources/typescript-angular/api.service.mustache b/modules/openapi-generator/src/main/resources/typescript-angular/api.service.mustache
index 822343842431..f60df119a660 100644
--- a/modules/openapi-generator/src/main/resources/typescript-angular/api.service.mustache
+++ b/modules/openapi-generator/src/main/resources/typescript-angular/api.service.mustache
@@ -186,6 +186,9 @@ export class {{classname}} extends BaseService {
 {{#isOAuth}}
         localVarHeaders = this.configuration.addCredentialToHeaders('{{name}}', 'Authorization', localVarHeaders, 'Bearer ');
 {{/isOAuth}}
+{{#isOpenId}}
+        localVarHeaders = this.configuration.addCredentialToHeaders('{{name}}', 'Authorization', localVarHeaders, 'Bearer ');
+{{/isOpenId}}
 
 {{/authMethods}}
         const localVarHttpHeaderAcceptSelected: string | undefined = options?.httpHeaderAccept ?? this.configuration.selectHeaderAccept([
diff --git a/modules/openapi-generator/src/test/java/org/openapitools/codegen/typescript/typescriptangular/TypeScriptAngularClientCodegenTest.java b/modules/openapi-generator/src/test/java/org/openapitools/codegen/typescript/typescriptangular/TypeScriptAngularClientCodegenTest.java
index 7d7de3a8840e..e3acfc556211 100644
--- a/modules/openapi-generator/src/test/java/org/openapitools/codegen/typescript/typescriptangular/TypeScriptAngularClientCodegenTest.java
+++ b/modules/openapi-generator/src/test/java/org/openapitools/codegen/typescript/typescriptangular/TypeScriptAngularClientCodegenTest.java
@@ -489,4 +489,29 @@ public void testDeepObject() throws IOException {
         assertThat(fileContents).containsSubsequence("'options',\n", "<any>options,\n", "QueryParamStyle.DeepObject,\n", "true,\n");
         assertThat(fileContents).containsSubsequence("'inputOptions',\n", "<any>inputOptions,\n", "QueryParamStyle.DeepObject,\n", "true,\n");
     }
+
+    @Test
+    public void testOpenIdCredentialsAreSet() throws IOException {
+        // GIVEN
+        final String specPath = "src/test/resources/3_1/issue_21245.yaml";
+
+        File output = Files.createTempDirectory("test").toFile();
+        output.deleteOnExit();
+
+        // WHEN
+        final CodegenConfigurator configurator = new CodegenConfigurator()
+                .setGeneratorName("typescript-angular")
+                .setInputSpec(specPath)
+                .setOutputDir(output.getAbsolutePath().replace("\\", "/"));
+
+        final ClientOptInput clientOptInput = configurator.toClientOptInput();
+
+        Generator generator = new DefaultGenerator();
+        generator.opts(clientOptInput).generate();
+
+        //THEN
+        final String fileContents = Files.readString(Paths.get(output + "/api/default.service.ts"));
+        String credentialsSet = "localVarHeaders = this.configuration.addCredentialToHeaders('oidc', 'Authorization', localVarHeaders, 'Bearer ');";
+        assertThat(fileContents).contains(credentialsSet);
+    }
 }
diff --git a/modules/openapi-generator/src/test/resources/3_1/issue_21245.yaml b/modules/openapi-generator/src/test/resources/3_1/issue_21245.yaml
new file mode 100644
index 000000000000..e3c71d1243bd
--- /dev/null
+++ b/modules/openapi-generator/src/test/resources/3_1/issue_21245.yaml
@@ -0,0 +1,23 @@
+openapi: 3.1.0
+info:
+  title: Angular OIDC test
+  version: 1.0.0
+paths:
+  /test:
+    get:
+      responses:
+        '200':
+          description: Successful response
+          content:
+            application/json:
+              schema:
+                type: string
+components:
+  securitySchemes:
+    oidc:
+      type: openIdConnect
+      openIdConnectUrl: 'http://localhost:8000'
+security:
+  - oidc:
+      - board:read
+      - board:write
\ No newline at end of file