diff --git a/debian/patches/series b/debian/patches/series
index 70bb5ae..5fc2fc7 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -18,3 +18,4 @@
 0018-Add-missing-format-strings.patch
 0019-trek-Fix-error-that-prevents-visual-command-from-wor.patch
 0020-Update-README-and-remove-games-which-are-not-install.patch
+0021-Sync-countmail-with-NetBSD-HEAD.patch