diff --git a/src/groups/index.js b/src/groups/index.js
index a66e34c6b3..d9549ba805 100644
--- a/src/groups/index.js
+++ b/src/groups/index.js
@@ -55,7 +55,7 @@ Groups.removeEphemeralGroups = function (groups) {
 	return groups;
 };
 
-const isPrivilegeGroupRegex = /^cid:\d+:privileges:[\w\-:]+$/;
+const isPrivilegeGroupRegex = /^cid:(?:\d+|admin):privileges:[\w\-:]+$/;
 Groups.isPrivilegeGroup = function (groupName) {
 	return isPrivilegeGroupRegex.test(groupName);
 };
diff --git a/test/groups.js b/test/groups.js
index c80313e467..2fcb48d59e 100644
--- a/test/groups.js
+++ b/test/groups.js
@@ -1404,4 +1404,20 @@ describe('Groups', () => {
 			assert(!groupData['cover:url']);
 		});
 	});
+
+	describe('isPrivilegeGroup', () => {
+		assert.strictEqual(Groups.isPrivilegeGroup('cid:1:privileges:topics:find'), true);
+		assert.strictEqual(Groups.isPrivilegeGroup('cid:1:privileges:groups:topics:find'), true);
+		assert.strictEqual(Groups.isPrivilegeGroup('cid:0:privileges:groups:search:users'), true);
+		assert.strictEqual(Groups.isPrivilegeGroup('cid:admin:privileges:admin:users'), true);
+		assert.strictEqual(Groups.isPrivilegeGroup('cid::privileges:admin:users'), false);
+		assert.strictEqual(Groups.isPrivilegeGroup('cid:string:privileges:admin:users'), false);
+		assert.strictEqual(Groups.isPrivilegeGroup('admin'), false);
+		assert.strictEqual(Groups.isPrivilegeGroup('registered-users'), false);
+		assert.strictEqual(Groups.isPrivilegeGroup(''), false);
+		assert.strictEqual(Groups.isPrivilegeGroup(null), false);
+		assert.strictEqual(Groups.isPrivilegeGroup(undefined), false);
+		assert.strictEqual(Groups.isPrivilegeGroup(false), false);
+		assert.strictEqual(Groups.isPrivilegeGroup(true), false);
+	});
 });