diff --git a/src/com/android/settings/users/UserSettings.java b/src/com/android/settings/users/UserSettings.java
index 0cf01e311e1..c387d9e461d 100644
--- a/src/com/android/settings/users/UserSettings.java
+++ b/src/com/android/settings/users/UserSettings.java
@@ -919,7 +919,7 @@ public class UserSettings extends SettingsPreferenceFragment
             d = mCreateUserDialogController.createDialog(
                     getActivity(),
                     this::startActivityForResult,
-                    UserManager.isMultipleAdminEnabled(),
+                    canCreateAdminUser(),
                     (userName, userIcon, isAdmin) -> {
                         mPendingUserIcon = userIcon;
                         mPendingUserName = userName;
@@ -937,6 +937,19 @@ public class UserSettings extends SettingsPreferenceFragment
         return d;
     }
 
+    /**
+     * Checks if the creation of a new admin user is allowed.
+     * @return {@code true} if creating a new admin is allowed, {@code false} otherwise.
+     */
+    private boolean canCreateAdminUser() {
+        if (Flags.unicornModeRefactoringForHsumReadOnly()) {
+            return UserManager.isMultipleAdminEnabled()
+                    && !mUserManager.hasUserRestriction(UserManager.DISALLOW_GRANT_ADMIN);
+        } else {
+            return UserManager.isMultipleAdminEnabled();
+        }
+    }
+
     @Override
     public int getDialogMetricsCategory(int dialogId) {
         switch (dialogId) {