diff --git a/openbsc/src/libmsc/transaction.c b/openbsc/src/libmsc/transaction.c
index bcfb6af..c144196 100644
--- a/openbsc/src/libmsc/transaction.c
+++ b/openbsc/src/libmsc/transaction.c
@@ -103,8 +103,10 @@
 		trans->paging_request = NULL;
 	}
 
-	if (trans->subscr)
+	if (trans->subscr) {
 		subscr_put(trans->subscr);
+		trans->subscr = NULL;
+	}
 
 	llist_del(&trans->entry);