diff --git a/bootstrap/ISBPL.java b/bootstrap/ISBPL.java
index f36511d..47c781a 100644
--- a/bootstrap/ISBPL.java
+++ b/bootstrap/ISBPL.java
@@ -792,7 +792,7 @@ public class ISBPL {
                         ISBPLDebugger debugger = new ISBPLDebugger(this);
                         debugger.start();
                         try {
-                            while(debugger.port == -1) Thread.sleep(1);
+                            while(debuggerIPC.threadID == -1) Thread.sleep(1);
                         }
                         catch (InterruptedException e) {
                             e.printStackTrace();
diff --git a/std.isbpl b/std.isbpl
index 907b7de..909e225 100644
--- a/std.isbpl
+++ b/std.isbpl
@@ -378,3 +378,7 @@ func struppercase {
     }
     s _string
 }
+
+func main {
+    pop 0
+}