1 files changed, 3 insertions, 1 deletions
diff --git a/src/org/traccar/http/MainServlet.java b/src/org/traccar/http/MainServlet.java
index a3eae4e55..87769b780 100644
--- a/src/org/traccar/http/MainServlet.java
+++ b/src/org/traccar/http/MainServlet.java
@@ -49,7 +49,9 @@ public class MainServlet extends HttpServlet {
 
         String command = req.getPathInfo();
 
-        if (command.equals("/async")) {
+        if (command == null) {
+            resp.sendError(HttpServletResponse.SC_BAD_REQUEST);
+        } else if (command.equals("/async")) {
             async(req.startAsync());
         } else if (command.equals("/login")) {
             login(req, resp);