diff --git a/src/libmsc/transaction.c b/src/libmsc/transaction.c
index f62d6b4..df770ed 100644
--- a/src/libmsc/transaction.c
+++ b/src/libmsc/transaction.c
@@ -216,7 +216,7 @@
 
 /*! Check if we have any transaction for given connection
  * \param[in] conn Connection to check
- * \returns 1 in case there is a transaction, 0 otherwise
+ * \returns transaction pointer if found, NULL otherwise
  */
 struct gsm_trans *trans_has_conn(const struct ran_conn *conn)
 {