diff --git a/core/lib/Drupal/Core/Database/Connection.php b/core/lib/Drupal/Core/Database/Connection.php
index af91674..77ace77 100644
--- a/core/lib/Drupal/Core/Database/Connection.php
+++ b/core/lib/Drupal/Core/Database/Connection.php
@@ -821,7 +821,7 @@ public function schema() {
   /**
    * Escapes a database name string.
    *
-   * Force all database names to be strictly alphanumeric-plus-underscore.
+   * Force all database names to be strictly alphanumeric-plus-underscore-and-period.
    * For some database drivers, it may also wrap the database name in
    * database-specific escape characters.
    *
@@ -835,7 +835,7 @@ public function escapeDatabase($database) {
   /**
    * Escapes a table name string.
    *
-   * Force all table names to be strictly alphanumeric-plus-underscore.
+   * Force all table names to be strictly alphanumeric-plus-underscore-and-period.
    * For some database drivers, it may also wrap the table name in
    * database-specific escape characters.
    *
@@ -849,7 +849,7 @@ public function escapeTable($table) {
   /**
    * Escapes a field name string.
    *
-   * Force all field names to be strictly alphanumeric-plus-underscore.
+   * Force all field names to be strictly alphanumeric-plus-underscore-and-period.
    * For some database drivers, it may also wrap the field name in
    * database-specific escape characters.
    *