diff --git a/karoo_gp.py b/karoo_gp.py
index a89fbb8..dbfdd3c 100644
--- a/karoo_gp.py
+++ b/karoo_gp.py
@@ -51,7 +51,7 @@ An example is given, as follows:
 '''
 
 import os
-import sys; #sys.path.append('modules/') # add directory 'modules' to the current path
+import sys; sys.path.append('modules/') # add directory 'modules' to the current path
 import argparse
 import karoo_gp_base_class; gp = karoo_gp_base_class.Base_GP()
 
diff --git a/karoo_gp_base_class.py b/modules/karoo_gp_base_class.py
similarity index 100%
rename from karoo_gp_base_class.py
rename to modules/karoo_gp_base_class.py