diff --git a/ATWG/ATWG.py b/ATWG/ATWG.py
index 7a651db..42aeac1 100644
--- a/ATWG/ATWG.py
+++ b/ATWG/ATWG.py
@@ -78,8 +78,8 @@ def parse_cli(self, cliArgs=None):
         parser.add_argument("--riseTime",  nargs=1, default=None,     help="temperarture INcreasing speed")           # temperature change rate in postive temperature direction
         parser.add_argument("--fallTime",  nargs=1, default=None,     help="temperarture DEcreasing speed")           # temperature change rate in negative temperature direction
         # climate chamber
-        parser.add_argument("--chamber", nargs=1, default=self.avlChambers[0] help="Used climate chamber")                      # used chamber
-        parser.add_argument("--port",    nargs=1, default="",                 help="System port to climate chamber, f.e. COM1") # interface
+        parser.add_argument("--chamber", nargs=1, default=self.avlChambers[0], help="Used climate chamber")                      # used chamber
+        parser.add_argument("--port",    nargs=1, default="",                  help="System port to climate chamber, f.e. COM1") # interface
         # parse
         args = parser.parse_args(cliArgs)
         # select climate chamber