diff --git a/src/libprs500/parallel.py b/src/libprs500/parallel.py
index f349ee09d3..412a062dd1 100644
--- a/src/libprs500/parallel.py
+++ b/src/libprs500/parallel.py
@@ -112,7 +112,11 @@ class Server(object):
         cmd = prefix + 'from libprs500.parallel import run_job; run_job(\'%s\')'%binascii.hexlify(job_data)
         
         if not monitor:
-            popen([python, '-c', cmd])
+            p = popen([python, '-c', cmd], stdout=subprocess.PIPE, stdin=subprocess.PIPE,
+                  stderr=subprocess.PIPE)
+            p.stdout.close()
+            p.stdin.close()
+            p.stderr.close()
             return
         
         output = open(os.path.join(job_dir, 'output.txt'), 'wb')