diff --git a/public/openapi/api/post-queue.yaml b/public/openapi/api/post-queue.yaml
index 7825ef3e6f..46fa13c328 100644
--- a/public/openapi/api/post-queue.yaml
+++ b/public/openapi/api/post-queue.yaml
@@ -47,28 +47,36 @@ get:
                     items:
                       type: object
                       properties:
-                        bgColor:
-                          type: string
                         cid:
                           type: number
-                        color:
-                          type: string
-                        disabledClass:
-                          nullable: true
-                        icon:
-                          type: string
-                        imageClass:
+                          description: A category identifier
+                        name:
                           type: string
                         level:
                           type: string
-                        link:
-                          type: string
-                        name:
+                        icon:
                           type: string
                         parentCid:
                           type: number
-                        slug:
+                          description: The category identifier for the category that is the immediate
+                            ancestor of the current category
+                        color:
+                          type: string
+                        bgColor:
+                          type: string
+                        selected:
+                          type: boolean
+                        imageClass:
                           type: string
+                      required:
+                        - bgColor
+                        - cid
+                        - color
+                        - icon
+                        - imageClass
+                        - level
+                        - name
+                        - parentCid
                   allCategoriesUrl:
                     type: string
                   selectedCategory:
diff --git a/public/openapi/api/unread.yaml b/public/openapi/api/unread.yaml
index f383633cfe..f4eb7913bc 100644
--- a/public/openapi/api/unread.yaml
+++ b/public/openapi/api/unread.yaml
@@ -253,6 +253,16 @@ get:
                           type: string
                   allCategoriesUrl:
                     type: string
+                  selectedCategory:
+                    type: object
+                    properties:
+                      icon:
+                        type: string
+                      name:
+                        type: string
+                      bgColor:
+                        type: string
+                    nullable: true
                   selectedCids:
                     type: array
                     items:
diff --git a/src/controllers/helpers.js b/src/controllers/helpers.js
index 3fbcc67771..3d4b117ca5 100644
--- a/src/controllers/helpers.js
+++ b/src/controllers/helpers.js
@@ -281,7 +281,7 @@ async function getCategoryData(cids, uid, selectedCid, states, privilege) {
 	} else if (selectedCategory.length === 1) {
 		selectedCategory = selectedCategory[0];
 	} else {
-		selectedCategory = undefined;
+		selectedCategory = null;
 	}
 
 	return {
diff --git a/src/controllers/recent.js b/src/controllers/recent.js
index d4e20d69fc..c40795b267 100644
--- a/src/controllers/recent.js
+++ b/src/controllers/recent.js
@@ -65,7 +65,7 @@ recentController.getData = async function (req, url, sort) {
 	data.showTopicTools = isPrivileged;
 	data.categories = categoryData.categories;
 	data.allCategoriesUrl = url + helpers.buildQueryString(req.query, 'cid', '');
-	data.selectedCategory = categoryData.selectedCategory || null;
+	data.selectedCategory = categoryData.selectedCategory;
 	data.selectedCids = categoryData.selectedCids;
 	data['feeds:disableRSS'] = meta.config['feeds:disableRSS'] || 0;
 	data.rssFeedUrl = nconf.get('relative_path') + '/' + url + '.rss';