diff --git a/block/vdi.c b/block/vdi.c
index 5627e7d764..2a6dc26124 100644
--- a/block/vdi.c
+++ b/block/vdi.c
@@ -690,6 +690,7 @@ nonallocating_write:
 
     logout("finished data write\n");
     if (ret < 0) {
+        g_free(block);
         return ret;
     }