diff --git a/lang/en/htmlcert.php b/lang/en/htmlcert.php
index ffa177c..d9070a7 100644
--- a/lang/en/htmlcert.php
+++ b/lang/en/htmlcert.php
@@ -108,6 +108,7 @@ $string['gethtmlcert'] = 'View certificate';
 $string['gradeoutcome'] = 'Outcome';
 $string['height'] = 'Height';
 $string['height_help'] = 'This is the height of the certificate PDF in mm. For reference an A4 piece of paper is 297mm high and a letter is 279mm high.';
+$string['html'] = 'HTML';
 $string['invalidcode'] = 'Invalid code supplied.';
 $string['invalidcolour'] = 'Invalid colour chosen, please enter a valid HTML colour name, or a six-digit, or three-digit hexadecimal colour.';
 $string['invalidelementwidth'] = 'Please enter a positive number.';