diff --git a/yjit/src/core.rs b/yjit/src/core.rs
index 43ad688cc9..aaf9ca2055 100644
--- a/yjit/src/core.rs
+++ b/yjit/src/core.rs
@@ -1521,6 +1521,7 @@ impl std::fmt::Debug for Branch {
 impl PendingBranch {
     /// Set up a branch target at `target_idx`. Find an existing block to branch to
     /// or generate a stub for one.
+    #[must_use]
     fn set_target(
         &self,
         target_idx: u32,