diff --git a/js/menu.js b/js/menu.js
index 84804bb6..e23af21a 100644
--- a/js/menu.js
+++ b/js/menu.js
@@ -248,6 +248,8 @@ function getKey(item) {
       return item.caption;
     case 'step':
       return item.id;
+    case 'concrete method':
+      return item.abstractAoid;
     default:
       throw new Error("Can't get key for " + item.type);
   }
diff --git a/package-lock.json b/package-lock.json
index 3e83210c..4f6244da 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
 	"name": "ecmarkup",
-	"version": "23.0.1",
+	"version": "23.0.2",
 	"lockfileVersion": 2,
 	"requires": true,
 	"packages": {
 		"": {
 			"name": "ecmarkup",
-			"version": "23.0.1",
+			"version": "23.0.2",
 			"license": "MIT",
 			"dependencies": {
 				"chalk": "^4.1.2",
diff --git a/package.json b/package.json
index 0e4e0eab..42c295f9 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "ecmarkup",
-	"version": "23.0.1",
+	"version": "23.0.2",
 	"description": "Custom element definitions and core utilities for markup that specifies ECMAScript and related technologies.",
 	"main": "lib/ecmarkup.js",
 	"typings": "lib/ecmarkup.d.ts",
diff --git a/test/baselines/generated-reference/assets-inline.html b/test/baselines/generated-reference/assets-inline.html
index 4bc70013..f12126b6 100644
--- a/test/baselines/generated-reference/assets-inline.html
+++ b/test/baselines/generated-reference/assets-inline.html
@@ -332,6 +332,8 @@
       return item.caption;
     case 'step':
       return item.id;
+    case 'concrete method':
+      return item.abstractAoid;
     default:
       throw new Error("Can't get key for " + item.type);
   }