diff --git a/libfprint/drivers/virtual-device-storage.c b/libfprint/drivers/virtual-device-storage.c
index a4c94252..dbda8057 100644
--- a/libfprint/drivers/virtual-device-storage.c
+++ b/libfprint/drivers/virtual-device-storage.c
@@ -136,7 +136,7 @@ dev_list (FpDevice *dev)
       return;
     }
 
-  prints_list = g_ptr_array_new_full (g_hash_table_size (vdev->prints_storage), NULL);
+  prints_list = g_ptr_array_new_full (g_hash_table_size (vdev->prints_storage), g_object_unref);
   data.dev = dev;
   data.res = prints_list;