diff --git a/docs/Standalone-certificates.md b/docs/Standalone-certificates.md
index 613310df..c17fb568 100644
--- a/docs/Standalone-certificates.md
+++ b/docs/Standalone-certificates.md
@@ -32,7 +32,7 @@ The user configuration file is a collection of bash variables and array, and fol
 
 `LETSENCRYPT_uniqueidentifier_HOST` : a bash array containing domain(s) that will be covered by the certificate corresponding to `uniqueidentifier`.
 
-Each identifier in `LETSENCRYPT_STANDALONE_CERTS` must have its own corresponding `LETSENCRYPT_uniqueidentifier_HOST` array.
+Each identifier in `LETSENCRYPT_STANDALONE_CERTS` must have its own corresponding `LETSENCRYPT_uniqueidentifier_HOST` array, where the string `uniqueidentifier` has to be identical to that identifier. 
 
 **Minimal example generating a single certificate for a single domain:**