diff --git a/pkgs/servers/mail/opensmtpd/default.nix b/pkgs/servers/mail/opensmtpd/default.nix
index ab2bdae0add7..6a9fc815fd92 100644
--- a/pkgs/servers/mail/opensmtpd/default.nix
+++ b/pkgs/servers/mail/opensmtpd/default.nix
@@ -33,6 +33,7 @@ stdenv.mkDerivation rec {
     "--with-auth-pam"
     "--without-auth-bsdauth"
     "--with-path-socket=/run"
+    "--with-path-pidfile=/run"
     "--with-user-smtpd=smtpd"
     "--with-user-queue=smtpq"
     "--with-group-queue=smtpq"