diff --git a/hack42.py b/hack42.py
index e4f6a0c..b240eae 100644
--- a/hack42.py
+++ b/hack42.py
@@ -6,7 +6,7 @@ class Bot:
     def __init__(self, cmd, initcmd = [], user=None):
 
         if user: os.environ["USER"] = user
-        del os.environ["IRCSERVER"]
+        if os.environ["IRCSERVER"]: del os.environ["IRCSERVER"]
 
         self.proc = subprocess.Popen(cmd,
                             stdin = subprocess.PIPE,