diff --git a/util/grub-mkstandalone.c b/util/grub-mkstandalone.c
index 6017d7155..4907d44c0 100644
--- a/util/grub-mkstandalone.c
+++ b/util/grub-mkstandalone.c
@@ -284,6 +284,7 @@ add_tar_file (const char *from,
   grub_util_fd_close (in);
 
   write_pad (size);
+  free (tcn);
 }
 
 int