diff --git a/htdocs/core/lib/security.lib.php b/htdocs/core/lib/security.lib.php
index 88e6ebb7af5..ed757a16765 100644
--- a/htdocs/core/lib/security.lib.php
+++ b/htdocs/core/lib/security.lib.php
@@ -82,7 +82,8 @@ function dol_hash($chain, $type='0')
 	global $conf;
 
 	// No need to add salt for password_hash
-	if ($type == '0' && ! empty($conf->global->MAIN_SECURITY_HASH_ALGO) && $conf->global->MAIN_SECURITY_HASH_ALGO == 'password_hash') return password_hash($chain, PASSWORD_DEFAULT);
+	if ($type == '0' && ! empty($conf->global->MAIN_SECURITY_HASH_ALGO) && $conf->global->MAIN_SECURITY_HASH_ALGO == 'password_hash' && function_exists('password_hash'))
+        return password_hash($chain, PASSWORD_DEFAULT);
 
 	// Salt value
 	if (! empty($conf->global->MAIN_SECURITY_SALT)) $chain=$conf->global->MAIN_SECURITY_SALT.$chain;
@@ -114,7 +115,7 @@ function dol_verifyHash($chain, $hash, $type='0')
 {
 	global $conf;
 
-	if ($type == '0' && ! empty($conf->global->MAIN_SECURITY_HASH_ALGO) && $conf->global->MAIN_SECURITY_HASH_ALGO == 'password_hash') {
+	if ($type == '0' && ! empty($conf->global->MAIN_SECURITY_HASH_ALGO) && $conf->global->MAIN_SECURITY_HASH_ALGO == 'password_hash' && function_exists('password_verify')) {
 		if ($hash[0] == '$') return password_verify($chain, $hash);
 		else if(strlen($hash) == 32) return dol_verifyHash($chain, $hash, '3'); // md5
 		else if(strlen($hash) == 40) return dol_verifyHash($chain, $hash, '2'); // sha1md5
diff --git a/htdocs/install/step5.php b/htdocs/install/step5.php
index d271e552dd0..91c517f9644 100644
--- a/htdocs/install/step5.php
+++ b/htdocs/install/step5.php
@@ -181,7 +181,10 @@ if ($action == "set" || empty($action) || preg_match('/upgrade/i',$action))
     			    // Define default setup for password encryption
     			    dolibarr_set_const($db, "DATABASE_PWD_ENCRYPTED", "1", 'chaine', 0, '', $conf->entity);
     			    dolibarr_set_const($db, "MAIN_SECURITY_SALT", dol_print_date(dol_now(), 'dayhourlog'), 'chaine', 0, '', 0);      // All entities
-    			    dolibarr_set_const($db, "MAIN_SECURITY_HASH_ALGO", 'password_hash', 'chaine', 0, '', 0);                         // All entities
+                    if (function_exists('password_hash'))
+                        dolibarr_set_const($db, "MAIN_SECURITY_HASH_ALGO", 'password_hash', 'chaine', 0, '', 0);                     // All entities
+                    else
+                        dolibarr_set_const($db, "MAIN_SECURITY_HASH_ALGO", 'sha1md5', 'chaine', 0, '', 0);                           // All entities
     			}
 		    }