diff --git a/README.rst b/README.rst
index 87a2909cb..c4f8e8c90 100644
--- a/README.rst
+++ b/README.rst
@@ -78,6 +78,10 @@ Development version ::
     pip install -i https://testpypi.python.org/pypi pymchelper
 
 
+of directly from GIT::
+
+    pip install versioneer
+    pip install git+https://github.com/DataMedSci/pymchelper.git
 
 Documentation
 =============
diff --git a/pymchelper/bdo2txt.py b/pymchelper/bdo2txt.py
index e39f051cf..b6ccb55b2 100644
--- a/pymchelper/bdo2txt.py
+++ b/pymchelper/bdo2txt.py
@@ -573,7 +573,7 @@ def merge_many(input_file_list,
         merge_list(group_with_same_core, core_name + ".txt", conv_names, nan)
 
 
-def main(args):
+def main(args=sys.argv[1:]):
     parser = argparse.ArgumentParser()
     parser.add_argument("inputfile",
                         help='input filename, file list or pattern', type=str)