diff --git a/build.xml b/build.xml
index 631abd71f..52b1e3572 100644
--- a/build.xml
+++ b/build.xml
@@ -174,7 +174,6 @@
            source="${javacSource}" target="${javacTarget}" encoding="UTF-8">
       <classpath refid="project.class.path" />
       <compilerarg value="-Xlint"/>
-      <compilerarg value="-nowarn"/>
     </javac>
 
     <!-- prepare classpath for MANIFEST (manifest cp is relative to jar) -->
diff --git a/source/net/yacy/htroot/ConfigAccounts_p.java b/source/net/yacy/htroot/ConfigAccounts_p.java
index 053ed4c68..293944620 100644
--- a/source/net/yacy/htroot/ConfigAccounts_p.java
+++ b/source/net/yacy/htroot/ConfigAccounts_p.java
@@ -82,7 +82,7 @@ public class ConfigAccounts_p {
                 env.setConfig(SwitchboardConstants.ADMIN_ACCOUNT_B64MD5,  sb.encodeDigestAuth(user, pw1));
                 env.setConfig(SwitchboardConstants.ADMIN_ACCOUNT_USER_NAME,user);
                 // make sure server accepts new credentials
-                final YaCyHttpServer jhttpserver = (YaCyHttpServer)sb.getHttpServer();
+                final YaCyHttpServer jhttpserver = sb.getHttpServer();
                 if (!user.equals(oldusername)) jhttpserver.removeUser(oldusername);
                 jhttpserver.resetUser(user);
             } else {
diff --git a/source/net/yacy/htroot/ConfigUser_p.java b/source/net/yacy/htroot/ConfigUser_p.java
index b567b5c6b..9a5360662 100644
--- a/source/net/yacy/htroot/ConfigUser_p.java
+++ b/source/net/yacy/htroot/ConfigUser_p.java
@@ -153,7 +153,7 @@ public class ConfigUser_p {
                 } catch (final Exception e) {
                     ConcurrentLog.logException(e);
                 }
-                final YaCyHttpServer jhttpserver = (YaCyHttpServer) sb.getHttpServer();
+                final YaCyHttpServer jhttpserver = sb.getHttpServer();
                 jhttpserver.resetUser(entry.getUserName());
             } else {
                 prop.put("error", "1");
@@ -164,7 +164,7 @@ public class ConfigUser_p {
             prop.putHTML("username", username);
         } else if (post.containsKey("delete")) {
             sb.userDB.removeEntry(post.get("username"));
-            final YaCyHttpServer jhttpserver = (YaCyHttpServer) sb.getHttpServer();
+            final YaCyHttpServer jhttpserver = sb.getHttpServer();
             jhttpserver.removeUser(post.get("username"));
             prop.put(serverObjects.ACTION_LOCATION, "ConfigAccountList_p.html"); // jump back to user list
         }