diff --git a/openbsc/src/libmsc/transaction.c b/openbsc/src/libmsc/transaction.c
index c144196..e425e67 100644
--- a/openbsc/src/libmsc/transaction.c
+++ b/openbsc/src/libmsc/transaction.c
@@ -113,7 +113,7 @@
 	if (trans->conn)
 		msc_release_connection(trans->conn);
 
-
+	trans->conn = NULL;
 	talloc_free(trans);
 }