diff --git a/pkgs/by-name/gn/gnucobol/package.nix b/pkgs/by-name/gn/gnucobol/package.nix
index 4a8f7bcd7983..76231551ccc7 100644
--- a/pkgs/by-name/gn/gnucobol/package.nix
+++ b/pkgs/by-name/gn/gnucobol/package.nix
@@ -143,6 +143,7 @@ stdenv.mkDerivation (finalAttrs: {
       gpl3Only
       lgpl3Only
     ];
+    mainProgram = "cobc";
     maintainers = with lib.maintainers; [
       lovesegfault
       techknowlogick