Fix 'source' error message.

1 files changed, 1 insertions, 1 deletions

diff --git a/kconfiglib.py b/kconfiglib.py
index aa2ee04..0fb4fcd 100644
--- a/kconfiglib.py
+++ b/kconfiglib.py
@@ -1088,7 +1088,7 @@ class Config():
                     raise IOError, ('{0}:{1}: sourced file "{2}" (expands to\n'
                                     '"{3}") not found. Perhaps base_dir\n'
                                     '(argument to Config.__init__(), currently\n'
-                                    '"{3}") is set to the wrong value.'
+                                    '"{4}") is set to the wrong value.'
                                     .format(filename,
                                             linenr,
                                             kconfig_file,