diff --git a/domain/category/endpoint.go b/domain/category/endpoint.go
index 2cb4ea47..117f8218 100644
--- a/domain/category/endpoint.go
+++ b/domain/category/endpoint.go
@@ -310,8 +310,7 @@ func (h *Handler) GetSummary(w http.ResponseWriter, r *http.Request) {
 }
 
 /*
-	- category view permission handling
-	- filter users using new permission
+	- filter users using account.users = true/false
 	- link/unlink document to category
 	- check print/pdf
 	- filter space documents by category -- URL param? nested route?
diff --git a/domain/permission/endpoint.go b/domain/permission/endpoint.go
index 21e1e960..4f653c6e 100644
--- a/domain/permission/endpoint.go
+++ b/domain/permission/endpoint.go
@@ -330,6 +330,12 @@ func (h *Handler) SetCategoryPermissions(w http.ResponseWriter, r *http.Request)
 		return
 	}
 
+	spaceID := request.Query(r, "space")
+	if len(id) == 0 {
+		response.WriteMissingDataError(w, method, "space")
+		return
+	}
+
 	defer streamutil.Close(r.Body)
 	body, err := ioutil.ReadAll(r.Body)
 	if err != nil {
@@ -346,12 +352,6 @@ func (h *Handler) SetCategoryPermissions(w http.ResponseWriter, r *http.Request)
 		return
 	}
 
-	if len(model) == 0 {
-		response.WriteEmpty(w)
-		return
-	}
-
-	spaceID := model[0].SpaceID
 	if !HasPermission(ctx, *h.Store, spaceID, permission.SpaceManage, permission.SpaceOwner) {
 		response.WriteForbiddenError(w)
 		return
diff --git a/gui/app/components/folder/category-admin.js b/gui/app/components/folder/category-admin.js
index c99c1ae0..9a1ae185 100644
--- a/gui/app/components/folder/category-admin.js
+++ b/gui/app/components/folder/category-admin.js
@@ -182,6 +182,7 @@ export default Ember.Component.extend(NotifierMixin, TooltipMixin, DropdownMixin
 		},
 
 		onGrantAccess() {
+			let folder = this.get('folder');
 			let category = this.get('currentCategory');
 			let users = this.get('categoryUsers').filterBy('selected', true);
 			let viewers = [];
@@ -200,7 +201,7 @@ export default Ember.Component.extend(NotifierMixin, TooltipMixin, DropdownMixin
 				viewers.push(v);
 			});
 
-			this.get('categoryService').setViewers(category.get('id'), viewers).then(() => {
+			this.get('categoryService').setViewers(folder.get('id'), category.get('id'), viewers).then(() => {
 				this.load();
 			});
 
diff --git a/gui/app/services/category.js b/gui/app/services/category.js
index ccbba2a4..bad37b9b 100644
--- a/gui/app/services/category.js
+++ b/gui/app/services/category.js
@@ -111,8 +111,8 @@ export default BaseService.extend({
 	},
 
 	// Save list of users who can see given category
-	setViewers(categoryId, viewers) {
-		return this.get('ajax').request(`category/${categoryId}/permission`, {
+	setViewers(spaceId, categoryId, viewers) {
+		return this.get('ajax').request(`category/${categoryId}/permission?space=${spaceId}`, {
 			method: 'PUT',
 			contentType: 'json',
 			data: JSON.stringify(viewers)
diff --git a/gui/app/templates/components/folder/category-admin.hbs b/gui/app/templates/components/folder/category-admin.hbs
index cc757b07..3066a71a 100644
--- a/gui/app/templates/components/folder/category-admin.hbs
+++ b/gui/app/templates/components/folder/category-admin.hbs
@@ -16,7 +16,8 @@
 							{{else}}
 								<div class="category">
 									<div class="name">{{cat.category}}</div>
-									<div class="info">{{cat.documents}} documents, {{cat.users}} people</div>
+									<div class="info">
+										{{cat.documents}} {{if (eq cat.documents 1) 'document' 'documents' }}, {{cat.users}} {{if (eq cat.users 1) 'person' 'people' }}</div>
 								</div>
 							{{/if}}
 							<div class="pull-right buttons">
diff --git a/gui/package.json b/gui/package.json
index 5569dba0..27cfa260 100644
--- a/gui/package.json
+++ b/gui/package.json
@@ -42,6 +42,7 @@
     "ember-resolver": "^4.0.0",
     "ember-simple-auth": "1.2.2",
     "ember-source": "~2.15.0",
+    "ember-truth-helpers": "^1.3.0",
     "loader.js": "^4.2.3"
   },
   "ember-addon": {
diff --git a/gui/yarn.lock b/gui/yarn.lock
index 64ff2555..97da1f32 100644
--- a/gui/yarn.lock
+++ b/gui/yarn.lock
@@ -2663,6 +2663,12 @@ ember-test-helpers@^0.6.3:
   version "0.6.3"
   resolved "https://registry.yarnpkg.com/ember-test-helpers/-/ember-test-helpers-0.6.3.tgz#f864cdf6f4e75f3f8768d6537785b5ab6e82d907"
 
+ember-truth-helpers@^1.3.0:
+  version "1.3.0"
+  resolved "https://registry.yarnpkg.com/ember-truth-helpers/-/ember-truth-helpers-1.3.0.tgz#6ed9f83ce9a49f52bb416d55e227426339a64c60"
+  dependencies:
+    ember-cli-babel "^5.1.6"
+
 ember-try-config@^2.0.1:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/ember-try-config/-/ember-try-config-2.1.0.tgz#e0e156229a542346a58ee6f6ad605104c98edfe0"