diff --git a/htdocs/takepos/receipt.php b/htdocs/takepos/receipt.php
index d52df0987b20c..f1dfa6f9fc2ec 100644
--- a/htdocs/takepos/receipt.php
+++ b/htdocs/takepos/receipt.php
@@ -111,7 +111,7 @@
 <br>
 <p class="left">
 <?php
-$constFreeText = 'TAKEPOS_HEADER'.$_SESSION['takeposterminal'];
+$constFreeText = 'TAKEPOS_HEADER'.($_SESSION['takeposterminal'] ?? '0');
 if (!empty($conf->global->TAKEPOS_HEADER) || getDolGlobalString($constFreeText)) {
 	$newfreetext = '';
 	$substitutionarray = getCommonSubstitutionArray($langs);
@@ -352,7 +352,7 @@
 <br>
 <br>
 <?php
-$constFreeText = 'TAKEPOS_FOOTER'.$_SESSION['takeposterminal'];
+$constFreeText = 'TAKEPOS_FOOTER'.($_SESSION['takeposterminal'] ?? '0');
 if (!empty($conf->global->TAKEPOS_FOOTER) || !empty($conf->global->{$constFreeText})) {
 	$newfreetext = '';
 	$substitutionarray = getCommonSubstitutionArray($langs);