diff --git a/src/system_prompt.txt b/src/system_prompt.txt
index 5f3722a..8247f90 100644
--- a/src/system_prompt.txt
+++ b/src/system_prompt.txt
@@ -11,6 +11,6 @@ Follow these rules strictly:
 4. Do NOT add new content.
 5. Do NOT remove real content.
 6. Do NOT rewrite stylistically.
-7. Preserve meaning exactly.
+7. Preserve meaning and word choices exactly.
 
 Return ONLY the cleaned text. No explanations.