diff --git a/Utilities/Python/FDS_validation_script.py b/Utilities/Python/FDS_validation_script.py
index 10da0de2dc..769a789b47 100644
--- a/Utilities/Python/FDS_validation_script.py
+++ b/Utilities/Python/FDS_validation_script.py
@@ -5,6 +5,7 @@
 import importlib
 import runpy
 importlib.reload(fdsplotlib) # use for development (while making changes to fdsplotlib.py)
+print("Using:", fdsplotlib.__file__)
 
 # If there is an error in one of the sub-scripts, print the message but do not stop the main script.