diff --git a/htdocs/core/lib/security.lib.php b/htdocs/core/lib/security.lib.php
index ece50c4d00f..94efaf2864a 100644
--- a/htdocs/core/lib/security.lib.php
+++ b/htdocs/core/lib/security.lib.php
@@ -210,7 +210,7 @@ function dolDecrypt($chain, $key = '')
 			if (!empty($tmpexplode[1]) && is_string($tmpexplode[0])) {
 				$newchain = openssl_decrypt($tmpexplode[1], $ciphering, $key, 0, $tmpexplode[0]);
 			} else {
-				$newchain = openssl_decrypt($tmpexplode[0], $ciphering, $key, 0, '');
+				$newchain = openssl_decrypt((string) $tmpexplode[0], $ciphering, $key, 0, '');
 			}
 		} else {
 			dol_syslog("Error dolDecrypt openssl_decrypt is not available", LOG_ERR);
@@ -310,7 +310,7 @@ function dolGetLdapPasswordHash($password, $type = 'md5')
 		$type = 'md5';
 	}
 
-	$salt = substr(sha1(time()), 0, 8);
+	$salt = substr(sha1((string) time()), 0, 8);
 
 	if ($type === 'md5') {
 		return '{MD5}' . base64_encode(hash("md5", $password, true)); //For OpenLdap with md5 (based on an unencrypted password in base)