diff --git a/doc/user/project/members/index.md b/doc/user/project/members/index.md
index 55f5d0c51f9446eeaad5e390e228c39ab55a4d76..7ca01d56da0139e2776c68fa609c258d8771aa12 100644
--- a/doc/user/project/members/index.md
+++ b/doc/user/project/members/index.md
@@ -354,6 +354,7 @@ You can prevent users from requesting access to a project.
 Prerequisites:
 
 - You must have the Owner role for the project.
+- The project must be public.
 
 1. On the left sidebar, select **Search or go to** and find your project.
 1. Select **Settings > General**.