diff --git a/azkaban-execserver/src/main/java/azkaban/execapp/JMXHttpServlet.java b/azkaban-execserver/src/main/java/azkaban/execapp/JMXHttpServlet.java
index 529325f..6412e0b 100644
--- a/azkaban-execserver/src/main/java/azkaban/execapp/JMXHttpServlet.java
+++ b/azkaban-execserver/src/main/java/azkaban/execapp/JMXHttpServlet.java
@@ -59,7 +59,7 @@ public class JMXHttpServlet extends HttpServlet implements ConnectorParams {
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
- HashMap<String, Object> ret = new HashMap<String, Object>();
+ Map<String, Object> ret = new HashMap<String, Object>();
if (hasParam(req, JMX_GET_MBEANS)) {
ret.put("mbeans", server.getMbeanNames());