diff --git a/pkgs/os-specific/linux/upower/default.nix b/pkgs/os-specific/linux/upower/default.nix
index c4af0bec9a23..629f61bf5b16 100644
--- a/pkgs/os-specific/linux/upower/default.nix
+++ b/pkgs/os-specific/linux/upower/default.nix
@@ -36,5 +36,6 @@ stdenv.mkDerivation rec {
     homepage = https://upower.freedesktop.org/;
     description = "A D-Bus service for power management";
     platforms = stdenv.lib.platforms.linux;
+    license = stdenv.lib.licenses.gpl2Plus;
   };
 }