diff --git a/crates/agent_ui/src/completion_provider.rs b/crates/agent_ui/src/completion_provider.rs
index 1c81ae85845e2c8a92f9c5dff9eb7d2d35ccd98b..5597aec7a66edd8561caa4ac53f672d5bd2a33ab 100644
--- a/crates/agent_ui/src/completion_provider.rs
+++ b/crates/agent_ui/src/completion_provider.rs
@@ -874,7 +874,7 @@ impl<T: PromptCompletionProviderDelegate> PromptCompletionProvider<T> {
         let project = workspace.read(cx).project().clone();
         let repo = project.read(cx).active_repository(cx)?;
 
-        let default_branch_receiver = repo.update(cx, |repo, _| repo.default_branch(false));
+        let default_branch_receiver = repo.update(cx, |repo, _| repo.default_branch(true));
 
         Some(cx.spawn(async move |_cx| {
             let base_ref = default_branch_receiver