diff --git a/pkgs/tools/X11/xcalib/default.nix b/pkgs/tools/X11/xcalib/default.nix
index c89dcf19e22..ff512325307 100644
--- a/pkgs/tools/X11/xcalib/default.nix
+++ b/pkgs/tools/X11/xcalib/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     homepage = http://xcalib.sourceforge.net/;
     description = "A tiny monitor calibration loader for X and MS-Windows";
-    license = licenses.gpl;
+    license = licenses.gpl2;
     maintainers = [ rickynils ];
     platforms = platforms.linux;
   };