diff --git a/crates/acp_thread/src/diff.rs b/crates/acp_thread/src/diff.rs
index e070bb02ef2e83a374f1ae4bfb1736ddafb4106d..95a003955c3ce5fa8d70bc825815fd367376889b 100644
--- a/crates/acp_thread/src/diff.rs
+++ b/crates/acp_thread/src/diff.rs
@@ -383,6 +383,10 @@ impl PendingDiff {
     }
 
     pub fn update(&mut self, cx: &mut Context<Diff>) {
+        if !self.auto_update {
+            return;
+        }
+
         let buffer = self.new_buffer.clone();
         let buffer_diff = self.diff.clone();
         let base_text = self.base_text.clone();