diff --git a/iot/api-client/manager/src/main/java/com/example/cloud/iot/examples/MqttExample.java b/iot/api-client/manager/src/main/java/com/example/cloud/iot/examples/MqttExample.java
index 133de8e01ee..24c741837ef 100644
--- a/iot/api-client/manager/src/main/java/com/example/cloud/iot/examples/MqttExample.java
+++ b/iot/api-client/manager/src/main/java/com/example/cloud/iot/examples/MqttExample.java
@@ -93,7 +93,7 @@ private static String createJwtEs(String projectId, String privateKeyFile) throw
 
     byte[] keyBytes = Files.readAllBytes(Paths.get(privateKeyFile));
     PKCS8EncodedKeySpec spec = new PKCS8EncodedKeySpec(keyBytes);
-    KeyFactory kf = KeyFactory.getInstance("ES256");
+    KeyFactory kf = KeyFactory.getInstance("EC");
 
     return jwtBuilder.signWith(SignatureAlgorithm.ES256, kf.generatePrivate(spec)).compact();
   }