diff --git a/test_regress/t/t_dist_copyright.py b/test_regress/t/t_dist_copyright.py
index 76ef97b24..a9246794a 100755
--- a/test_regress/t/t_dist_copyright.py
+++ b/test_regress/t/t_dist_copyright.py
@@ -37,6 +37,7 @@ EXEMPT_FILES_LIST = """
     include/gtkwave
     include/vltstd
     install-sh
+    nodist/verilator_saif_diff
     src/mkinstalldirs
     test_regress/t/t_altera_lpm.v
     test_regress/t/t_flag_f__3.v