diff --git a/pkgs/development/python-modules/sharedmem/default.nix b/pkgs/development/python-modules/sharedmem/default.nix
index 527fe8947c00..bb32022ec263 100644
--- a/pkgs/development/python-modules/sharedmem/default.nix
+++ b/pkgs/development/python-modules/sharedmem/default.nix
@@ -30,6 +30,6 @@ buildPythonPackage (finalAttrs: {
     homepage = "http://rainwoodman.github.io/sharedmem/";
     description = "Easier parallel programming on shared memory computers";
     maintainers = with lib.maintainers; [ edwtjo ];
-    license = lib.licenses.gpl3;
+    license = lib.licenses.gpl3Only;
   };
 })