diff --git a/lib/licenses.nix b/lib/licenses.nix
index 4cd65277771f..61612a2c236f 100644
--- a/lib/licenses.nix
+++ b/lib/licenses.nix
@@ -985,11 +985,6 @@ in mkLicense lset) ({
     fullName = "GNU Affero General Public License v3.0";
     deprecated = true;
   };
-  fdl11 = {
-    spdxId = "GFDL-1.1";
-    fullName = "GNU Free Documentation License v1.1";
-    deprecated = true;
-  };
   fdl12 = {
     spdxId = "GFDL-1.2";
     fullName = "GNU Free Documentation License v1.2";
diff --git a/pkgs/applications/networking/newsreaders/pan/default.nix b/pkgs/applications/networking/newsreaders/pan/default.nix
index b6afe0aa44e0..854f1c3484ec 100644
--- a/pkgs/applications/networking/newsreaders/pan/default.nix
+++ b/pkgs/applications/networking/newsreaders/pan/default.nix
@@ -58,6 +58,6 @@ stdenv.mkDerivation rec {
     homepage = "http://pan.rebelbase.com/";
     maintainers = [ maintainers.eelco ];
     platforms = platforms.linux;
-    license = with licenses; [ gpl2Only fdl11 ];
+    license = with licenses; [ gpl2Only fdl11Only ];
   };
 }