diff --git a/reactos/lib/advapi32/reg/reg.c b/reactos/lib/advapi32/reg/reg.c
index 2faaf7a66fa..81d43af9c52 100644
--- a/reactos/lib/advapi32/reg/reg.c
+++ b/reactos/lib/advapi32/reg/reg.c
@@ -938,7 +938,7 @@ RegDeleteTreeW(IN HKEY hKey,
                                    NULL);
 
         Status = NtOpenKey(&SubKeyHandle,
-                           KEY_READ,
+                           DELETE | KEY_ENUMERATE_SUB_KEYS | KEY_QUERY_VALUE,
                            &ObjectAttributes);
         if (!NT_SUCCESS(Status))
         {