diff --git a/backend/lexmark_x2600.c b/backend/lexmark_x2600.c
index 54fd12e89..4d6b6d7f7 100644
--- a/backend/lexmark_x2600.c
+++ b/backend/lexmark_x2600.c
@@ -1190,6 +1190,8 @@ sane_exit (void)
        lexmark_device = next_lexmark_device)
     {
       next_lexmark_device = lexmark_device->next;
+      free (lexmark_device->transfer_buffer);
+      free (lexmark_device->read_buffer);
       free (lexmark_device);
     }