diff --git a/dma-helpers.c b/dma-helpers.c
index 35cb500..57725d0 100644
--- a/dma-helpers.c
+++ b/dma-helpers.c
@@ -65,6 +65,7 @@
 void qemu_sglist_destroy(QEMUSGList *qsg)
 {
     g_free(qsg->sg);
+    memset(qsg, 0, sizeof(qsg));
 }

 typedef struct {