diff --git a/astlpc.c b/astlpc.c
index 5d51d64..c8f7a68 100644
--- a/astlpc.c
+++ b/astlpc.c
@@ -1142,6 +1142,11 @@
 	return rc;
 }
 
+bool mctp_astlpc_tx_done(struct mctp_binding_astlpc *astlpc)
+{
+	return astlpc->layout.tx.state == buffer_state_acquired;
+}
+
 int mctp_astlpc_poll(struct mctp_binding_astlpc *astlpc)
 {
 	uint8_t status, data;
diff --git a/libmctp-astlpc.h b/libmctp-astlpc.h
index 4d90894..110b998 100644
--- a/libmctp-astlpc.h
+++ b/libmctp-astlpc.h
@@ -41,6 +41,7 @@
 
 struct mctp_binding *mctp_binding_astlpc_core(struct mctp_binding_astlpc *b);
 
+bool mctp_astlpc_tx_done(struct mctp_binding_astlpc *astlpc);
 int mctp_astlpc_poll(struct mctp_binding_astlpc *astlpc);
 
 /* fileio-based interface */