diff --git a/core/restservices.class.inc.php b/core/restservices.class.inc.php
index 798c4e887..05d8942aa 100644
--- a/core/restservices.class.inc.php
+++ b/core/restservices.class.inc.php
@@ -714,7 +714,7 @@ class CoreServices implements iRestServiceProvider, iRestInputSanitizer
             }
             break;
         }
-		return json_encode($aJsonData, JSON_UNESCAPED_SLASHES | JSON_PRETTY_PRINT);
+		return json_encode($aJsonData, JSON_UNESCAPED_SLASHES | JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE);
 	}
 
 	/**
diff --git a/webservices/rest.php b/webservices/rest.php
index f27cad074..36f1ce82f 100644
--- a/webservices/rest.php
+++ b/webservices/rest.php
@@ -286,7 +286,7 @@ if (MetaModel::GetConfig()->Get('log_rest_service'))
 	$oLog->SetTrim('message', $sMessage);
 	$oLog->Set('code', $oResult->code);
 	$oResult->SanitizeContent();
-	$oLog->SetTrim('json_output', json_encode($oResult, JSON_UNESCAPED_SLASHES | JSON_PRETTY_PRINT));
+	$oLog->SetTrim('json_output', json_encode($oResult, JSON_UNESCAPED_SLASHES | JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE));
 
 	$oLog->DBInsertNoReload();
 	$oKPI->ComputeAndReport('Log inserted');