diff --git a/htdocs/core/ajax/onlineSign.php b/htdocs/core/ajax/onlineSign.php
index 333bd1335a7..17c47286571 100644
--- a/htdocs/core/ajax/onlineSign.php
+++ b/htdocs/core/ajax/onlineSign.php
@@ -69,7 +69,7 @@ $type = $mode;
 // Check securitykey
 $securekeyseed = '';
 if ($type == 'proposal') {
-	$securekeyseed = isset($conf->global->PROPOSAL_ONLINE_SIGNATURE_SECURITY_TOKEN) ? $conf->global->PROPOSAL_ONLINE_SIGNATURE_SECURITY_TOKEN : '';
+	$securekeyseed = getDolGlobalString('PROPOSAL_ONLINE_SIGNATURE_SECURITY_TOKEN');
 }
 
 if (empty($SECUREKEY) || !dol_verifyHash($securekeyseed.$type.$ref, $SECUREKEY, '0')) {
diff --git a/htdocs/public/onlinesign/newonlinesign.php b/htdocs/public/onlinesign/newonlinesign.php
index 5e30b0bc20e..2e58d5153cb 100644
--- a/htdocs/public/onlinesign/newonlinesign.php
+++ b/htdocs/public/onlinesign/newonlinesign.php
@@ -136,7 +136,7 @@ if ($source == 'proposal') {
 // Check securitykey
 $securekeyseed = '';
 if ($source == 'proposal') {
-	$securekeyseed = $conf->global->PROPOSAL_ONLINE_SIGNATURE_SECURITY_TOKEN;
+	$securekeyseed = getDolGlobalString('PROPOSAL_ONLINE_SIGNATURE_SECURITY_TOKEN');
 }
 
 if (!dol_verifyHash($securekeyseed.$type.$ref, $SECUREKEY, '0')) {