diff --git a/gns3server/config.py b/gns3server/config.py
index dc2fb80c..d0e592ea 100644
--- a/gns3server/config.py
+++ b/gns3server/config.py
@@ -47,7 +47,7 @@ class Config:
         if files and len(files):
             directory_name = os.path.dirname(files[0])
             if not directory_name or directory_name == "":
-                files[0] = './' + files[0]
+                files[0] = os.path.dirname(os.path.abspath(files[0])) + os.path.sep + files[0]
             self._main_config_file = files[0]
         else:
             self._main_config_file = None