diff --git a/DemoPrograms/Demo_Input_Validation.py b/DemoPrograms/Demo_Input_Validation.py
index c8b3dd50..0a963f0b 100644
--- a/DemoPrograms/Demo_Input_Validation.py
+++ b/DemoPrograms/Demo_Input_Validation.py
@@ -20,6 +20,6 @@ while True:             # Event Loop
     event, values = window.Read()
     if event in  (None, 'Exit'):
         break
-    if len(values['_INPUT_']) and values['_INPUT_'][-1] not in ('0123456789'):                 # if last char entered not a digit
-        window.Element('_INPUT_').Update(values['_INPUT_'][:-1])    # delete last char from input
+    if len(values['_INPUT_']) and values['_INPUT_'][-1] not in ('0123456789'):  # if last char entered not a digit
+        window.Element('_INPUT_').Update(values['_INPUT_'][:-1])                # delete last char from input
 window.Close()