--- pyLoadCore.py
+++ pyLoadCore.py
@@ -648,9 +648,10 @@
         except OSError:    # ERROR, fd wasn't open to begin with (ignored)
             pass
 
-    os.open(os.devnull, os.O_RDWR)    # standard input (0)
-    os.dup2(0, 1)            # standard output (1)
-    os.dup2(0, 2)
+    devnull_fd = os.open(os.devnull, os.O_RDWR)
+    os.dup2(devnull_fd, sys.stdin.fileno())
+    os.dup2(devnull_fd, sys.stdout.fileno())
+    os.dup2(devnull_fd, sys.stderr.fileno())
 
     pyload_core = Core()
     pyload_core.start()