diff --git a/src/main/org/apache/tools/ant/Main.java b/src/main/org/apache/tools/ant/Main.java
index 18feef827..bb07cabac 100644
--- a/src/main/org/apache/tools/ant/Main.java
+++ b/src/main/org/apache/tools/ant/Main.java
@@ -749,15 +749,6 @@ public class Main implements AntMain {
             final PrintStream savedErr = System.err;
             final PrintStream savedOut = System.out;
             final InputStream savedIn = System.in;
-
-            // use a system manager that prevents from System.exit()
-            SecurityManager oldsm = null;
-            oldsm = System.getSecurityManager();
-
-                //SecurityManager can not be installed here for backwards
-                //compatibility reasons (PD). Needs to be loaded prior to
-                //ant class if we are going to implement it.
-                //System.setSecurityManager(new NoExitSecurityManager());
             try {
                 if (allowInput) {
                     project.setDefaultInputStream(System.in);
@@ -826,12 +817,6 @@ public class Main implements AntMain {
 
                 project.executeTargets(targets);
             } finally {
-                // put back the original security manager
-                //The following will never eval to true. (PD)
-                if (oldsm != null) {
-                    System.setSecurityManager(oldsm);
-                }
-
                 System.setOut(savedOut);
                 System.setErr(savedErr);
                 System.setIn(savedIn);