diff --git a/pkgs/applications/science/math/glsurf/default.nix b/pkgs/applications/science/math/glsurf/default.nix
index bf8b5d7673b4..208bb95f930e 100644
--- a/pkgs/applications/science/math/glsurf/default.nix
+++ b/pkgs/applications/science/math/glsurf/default.nix
@@ -26,6 +26,6 @@ stdenv.mkDerivation {
   meta = {
     homepage = "https://raffalli.eu/~christophe/glsurf/";
     description = "A program to draw implicit surfaces and curves";
-    license = lib.licenses.lgpl21;
+    license = lib.licenses.gpl2Plus;
   };
 }