diff --git a/mlmmj-ldap-sync b/mlmmj-ldap-sync
index 3c98a36..baa3372 100755
--- a/mlmmj-ldap-sync
+++ b/mlmmj-ldap-sync
@@ -142,7 +142,8 @@ end
 
 def main
   # Parse configuration, bind to LDAP server
-  @configuration = read_configuration(@configuration_file)
+  configuration_file = ARGV[0] ? ARGV[0] : @configuration_file
+  @configuration = read_configuration(configuration_file)
   conn = connect_ldap
 
   domain = @configuration['domain']