diff --git a/jams-server/src/main/java/net/jami/jams/server/servlets/api/install/StartInstallServlet.java b/jams-server/src/main/java/net/jami/jams/server/servlets/api/install/StartInstallServlet.java
index 92cb3c9d8fd06727b91b4726347bf3384e56fb7f..af847d6ed7014ec19c486de2b4499d36d2186d28 100644
--- a/jams-server/src/main/java/net/jami/jams/server/servlets/api/install/StartInstallServlet.java
+++ b/jams-server/src/main/java/net/jami/jams/server/servlets/api/install/StartInstallServlet.java
@@ -53,7 +53,7 @@ public class StartInstallServlet extends HttpServlet {
         //Here we must decide which page to show - login or sign-up
         StatementList statementList = new StatementList();
         statementList.addStatement(new StatementElement("username","=","*",""));
-        if(dataStore.getUserDao().getObjects(null).size() > 0)
+        if(dataStore != null && dataStore.getUserDao() != null && dataStore.getUserDao().getObjects(null).size() > 0)
             resp.setHeader("showLogin","true");
         else
             resp.setHeader("showLogin","false");