diff --git a/grdwindinversion/main.py b/grdwindinversion/main.py
index 3e4b4bc..ceea32f 100644
--- a/grdwindinversion/main.py
+++ b/grdwindinversion/main.py
@@ -1,5 +1,6 @@
 from grdwindinversion.inversion import makeL2
 from grdwindinversion.utils import get_memory_usage
+import grdwindinversion
 import time
 import logging
 
@@ -36,13 +37,13 @@ def processor_starting_point():
     #     raise Exception('this processor only handle acquisitions with VV or VV+VH polarization for now.')
     if args.config_file is None:
         if 'S1' in input_file:
-            config_file = 'config_S1.yaml'
+            config_file = os.path.join(os.path.dirname(grdwindinversion.__file__),'config_S1.yaml')
         elif 'RCM' in input_file:
-            config_file = 'config_RCM.yaml'
+            config_file = os.path.join(os.path.dirname(grdwindinversion.__file__),'config_RCM.yaml')
         elif 'RS2' in input_file:
-            config_file = 'config_RS2.yaml'
+            config_file = os.path.join(os.path.dirname(grdwindinversion.__file__),'config_RS2.yaml')
         elif 'hy2b' in input_file:
-            config_file = 'config_hy2b.yaml'
+            config_file = os.path.join(os.path.dirname(grdwindinversion.__file__),'config_hy2b.yaml')
         else:
             raise Exception('config data file cannot be defined using the input filename')
     else: