diff --git a/backend/src/services/synthesis.rs b/backend/src/services/synthesis.rs
index 8cfbb5e..c3c1abf 100644
--- a/backend/src/services/synthesis.rs
+++ b/backend/src/services/synthesis.rs
@@ -375,7 +375,11 @@ async fn run_generation_inner(
         .await?;
 
     emit_progress(tx, "finalizing", "Finalisation...", 90);
-    let final_sections = build_final_sections(&final_results, &settings.categories)?;
+    let mut final_sections = build_final_sections(&final_results, &settings.categories)?;
+
+    // Restore validated URLs from scraped data — the LLM rewrite pass may
+    // hallucinate different URLs despite being told to preserve them.
+    restore_scraped_urls(&mut final_sections, &scraped, &settings.categories);
 
     // Step 12: Save synthesis to DB
     emit_progress(tx, "saving", "Sauvegarde de la synthese...", 95);
@@ -884,6 +888,37 @@ fn build_final_sections(
     Ok(sections)
 }
 
+/// Restore validated URLs from scraped data into the final sections.
+///
+/// The LLM rewrite pass may hallucinate different URLs despite being
+/// instructed to preserve them. This function replaces each article's URL
+/// with the original scraped URL by matching on position (category index,
+/// item index within category).
+fn restore_scraped_urls(
+    sections: &mut [NewsSection],
+    scraped: &std::collections::HashMap<String, Vec<ScrapedNewsItem>>,
+    categories: &[String],
+) {
+    for (i, section) in sections.iter_mut().enumerate() {
+        let key = format!("category_{}", i);
+        if let Some(scraped_items) = scraped.get(&key) {
+            for (j, item) in section.items.iter_mut().enumerate() {
+                if let Some(scraped_item) = scraped_items.get(j) {
+                    if item.url != scraped_item.url {
+                        tracing::debug!(
+                            category = %categories.get(i).unwrap_or(&key),
+                            original = %scraped_item.url,
+                            hallucinated = %item.url,
+                            "Restored hallucinated URL to scraped original"
+                        );
+                        item.url = scraped_item.url.clone();
+                    }
+                }
+            }
+        }
+    }
+}
+
 /// Minimum ratio of valid URLs (starting with `http`) required to skip the
 /// scrape+rewrite pass and use the search pass results directly.
 const URL_QUALITY_THRESHOLD: f64 = 0.70;