diff --git a/prompts.py b/prompts.py
index d75ee3b15..3b1b9d70b 100644
--- a/prompts.py
+++ b/prompts.py
@@ -52,6 +52,7 @@ EVERY ORIGINAL/UPDATED BLOCK MUST START WITH THE FILENAME!
 EVERY ORIGINAL/UPDATED BLOCK MUST BE TRIPLE QUOTED!
 
 THE ORIGINAL BLOCK MUST BE THE *EXACT* LINES FROM THE FILE!
+THE ORIGINAL BLOCK MUST INCLUDE ALL THE BLANK LINES IN THE ORIGINAL FILE.
 THE ORIGINAL BLOCK MUST INCLUDE ALL THE ORIGINAL LEADING SPACES AND INDENTATION!
 
 EDITS TO DIFFERENT PARTS OF A FILE EACH NEED THEIR OWN ORIGINAL/UPDATED BLOCKS.