diff --git a/include/osmocom/msc/transaction.h b/include/osmocom/msc/transaction.h
index 5e8d637..39b09ae 100644
--- a/include/osmocom/msc/transaction.h
+++ b/include/osmocom/msc/transaction.h
@@ -1,5 +1,4 @@
-#ifndef _TRANSACT_H
-#define _TRANSACT_H
+#pragma once
 
 #include <osmocom/msc/gsm_data.h>
 #include <osmocom/msc/gsm_subscriber.h>
@@ -117,5 +116,3 @@
 			  uint8_t protocol);
 struct gsm_trans *trans_has_conn(const struct ran_conn *conn);
 void trans_conn_closed(const struct ran_conn *conn);
-
-#endif