diff --git a/pkgs/tools/package-management/checkinstall/default.nix b/pkgs/tools/package-management/checkinstall/default.nix
index df1bf794062..6605d9de65a 100644
--- a/pkgs/tools/package-management/checkinstall/default.nix
+++ b/pkgs/tools/package-management/checkinstall/default.nix
@@ -69,5 +69,6 @@ stdenv.mkDerivation {
     description = "A tool for automatically generating Slackware, RPM or Debian packages when doing `make install'";
     maintainers = [ stdenv.lib.maintainers.eelco ];
     platforms = stdenv.lib.platforms.linux;
+    license = stdenv.lib.licenses.gpl2;
   };
 }