diff --git a/installation/language/en-US/en-US.ini b/installation/language/en-US/en-US.ini
index 978025b8a9aee..99739e1dce514 100644
--- a/installation/language/en-US/en-US.ini
+++ b/installation/language/en-US/en-US.ini
@@ -66,7 +66,7 @@ INSTL_DATABASE_PREFIX_DESC="Enter a table prefix or use the randomly generated o
 INSTL_DATABASE_TYPE_DESC="Select the database type."
 INSTL_DATABASE_USER_DESC="Either a username you created or a username provided by your host."
 INSTL_DATABASE_VALIDATION_ERROR="Check your database credentials, database type, database name or hostname. If you have MySQL 8 installed then please read this <a href=\"https://docs.joomla.org/Joomla_and_MySQL_8#Workaround_to_get_Joomla_working_with_MySQL_8\" target=\"_blank\">wiki</a> for more information."
-INSTL_USERNAME_INVALID="Joomla Super User account name invalid, avoid using special characters like '<, >, %, (, ), &' and quotes"
+INSTL_USERNAME_INVALID="Please enter a valid username. No space at beginning or end, at least %d characters and must <strong>not</strong> have the following characters: < > \ &quot; ' &#37; ; ( ) &."
 
 INSTL_INSTALL_JOOMLA="Install Joomla"
 INSTL_CONNECT_DB="Setup Database Connection"