diff --git a/ethers-providers/src/toolbox/pending_transaction.rs b/ethers-providers/src/toolbox/pending_transaction.rs
index 74bead5a..2af0234e 100644
--- a/ethers-providers/src/toolbox/pending_transaction.rs
+++ b/ethers-providers/src/toolbox/pending_transaction.rs
@@ -56,6 +56,7 @@ use wasm_timer::Delay;
 /// # }
 /// ```
 #[pin_project]
+#[must_use = "A PendingTransaction is a future and it must be polled or awaited to completion"]
 pub struct PendingTransaction<'a, P> {
     tx_hash: TxHash,
     confirmations: usize,