diff --git a/pkgs/tools/networking/ntpd-rs/default.nix b/pkgs/tools/networking/ntpd-rs/default.nix
index 9fb2a9b3f6a2..51fe2744439e 100644
--- a/pkgs/tools/networking/ntpd-rs/default.nix
+++ b/pkgs/tools/networking/ntpd-rs/default.nix
@@ -61,6 +61,7 @@ rustPlatform.buildRustPackage rec {
     description = "A full-featured implementation of the Network Time Protocol";
     homepage = "https://tweedegolf.nl/en/pendulum";
     changelog = "https://github.com/pendulum-project/ntpd-rs/blob/v${version}/CHANGELOG.md";
+    mainProgram = "ntp-ctl";
     license = with licenses; [ mit /* or */ asl20 ];
     maintainers = with maintainers; [ fpletz ];
     # note: Undefined symbols for architecture x86_64: "_ntp_adjtime"