diff --git a/lib/components/SideMenu/side-menu.html b/lib/components/SideMenu/side-menu.html
index 5b6ef0bd..9124c6f4 100644
--- a/lib/components/SideMenu/side-menu.html
+++ b/lib/components/SideMenu/side-menu.html
@@ -10,7 +10,7 @@
   <div *ngFor="let cat of categories; let idx = index" class="menu-cat">
 
     <label class="menu-cat-header" (click)="activateAndScroll(idx, -1)" [hidden]="cat.headless"
-    [ngClass]="{active: cat.active, disabled: !cat.ready && cat.methods.length}"> {{cat.name}}</label>
+    [ngClass]="{active: cat.active, disabled: !cat.ready }"> {{cat.name}}</label>
     <ul class="menu-subitems" [@itemAnimation]="cat.active ? 'expanded' : 'collapsed'">
       <li *ngFor="let method of cat.methods; trackBy:summary; let methIdx = index"
         [ngClass]="{active: method.active, disabled: !method.ready}"
diff --git a/lib/services/menu.service.ts b/lib/services/menu.service.ts
index f087e7b7..4459a252 100644
--- a/lib/services/menu.service.ts
+++ b/lib/services/menu.service.ts
@@ -53,11 +53,16 @@ export class MenuService {
     });
   }
 
-  enableItem(catIdx, methodIdx) {
+  enableItem(catIdx, methodIdx, skipUpdate = false) {
     let cat = this.categories[catIdx];
     cat.ready = true;
-    cat.methods[methodIdx].ready = true;
+    if (cat.methods.length) cat.methods[methodIdx].ready = true;
+    let prevCat = this.categories[catIdx - 1];
+    if (prevCat && !prevCat.ready && (prevCat.virtual || !prevCat.methods.length)) {
+      this.enableItem(catIdx - 1, -1, true);
+    }
 
+    if (skipUpdate) return;
     this.changed.next();
   }
 
diff --git a/lib/services/schema-helper.service.ts b/lib/services/schema-helper.service.ts
index 94d459f9..e990ff52 100644
--- a/lib/services/schema-helper.service.ts
+++ b/lib/services/schema-helper.service.ts
@@ -306,7 +306,7 @@ export class SchemaHelper {
     for (let header of (<Array<string>>(schema.info && schema.info['x-redoc-markdown-headers'] || []))) {
       let id = 'section/' + slugify(header);
       tag2MethodMapping[id] = {
-        name: header, id: id, virtual: true, ready: true, methods: [], idx: catIdx
+        name: header, id: id, virtual: true, methods: [], idx: catIdx
       };
       catIdx++;
     }
@@ -319,7 +319,6 @@ export class SchemaHelper {
         description: tag.description,
         headless: tag.name === '',
         empty: !!tag['x-traitTag'],
-        ready: !!tag['x-traitTag'],
         methods: [],
         idx: catIdx
       };