diff --git a/installation/language/en-GB/joomla.ini b/installation/language/en-GB/joomla.ini
index 4f9b10b788b2f..d5786ed3521b5 100644
--- a/installation/language/en-GB/joomla.ini
+++ b/installation/language/en-GB/joomla.ini
@@ -93,7 +93,7 @@ INSTL_DATABASE_NO_SCHEMA="No database schema exists for this database type."
 INSTL_DATABASE_PASSWORD_DESC="Enter the database password you created or a password provided by your host."
 INSTL_DATABASE_PREFIX_DESC="Enter a table prefix or use the randomly generated one."
 INSTL_DATABASE_PREFIX_DUPLICATE_DESC="If you are using an existing database with tables with the same prefix, Joomla will rename those existing tables by adding the prefix \"bak_\"."
-INSTL_DATABASE_PREFIX_MSG="The table prefix must start with a letter, optionally be followed by alphanumeric characters and by an underscore"
+INSTL_DATABASE_PREFIX_MSG="The table prefix must start with a letter, optionally be followed by alphanumeric characters, and must end with an underscore."
 INSTL_DATABASE_RESPONSE_ERROR="The installation process failed."
 INSTL_DATABASE_TYPE_DESC="Select the database type."
 INSTL_DATABASE_USER_DESC="Enter the database username you created or a username provided by your host."