diff --git a/lib/licenses.nix b/lib/licenses.nix
index 103e52666bfe..8be291e5bab4 100644
--- a/lib/licenses.nix
+++ b/lib/licenses.nix
@@ -1170,9 +1170,9 @@ lib.mapAttrs mkLicense (
       fullName = "Q Public License 1.0";
     };
 
-    qwt = {
-      fullName = "Qwt License, Version 1.0";
-      url = "https://qwt.sourceforge.io/qwtlicense.html";
+    qwtException = {
+      spdxId = "Qwt-exception-1.0";
+      fullName = "Qwt exception 1.0";
     };
 
     ruby = {
diff --git a/pkgs/development/libraries/qwt/6_1.nix b/pkgs/development/libraries/qwt/6_1.nix
index bf5a4c35a702..e5c5196cbb73 100644
--- a/pkgs/development/libraries/qwt/6_1.nix
+++ b/pkgs/development/libraries/qwt/6_1.nix
@@ -36,7 +36,10 @@ stdenv.mkDerivation rec {
     description = "Qt widgets for technical applications";
     homepage = "http://qwt.sourceforge.net/";
     # LGPL 2.1 plus a few exceptions (more liberal)
-    license = licenses.qwt;
+    license = with lib.licenses; [
+      lgpl21Only
+      qwtException
+    ];
     platforms = platforms.unix;
     maintainers = [ maintainers.bjornfor ];
   };
diff --git a/pkgs/development/libraries/qwt/default.nix b/pkgs/development/libraries/qwt/default.nix
index 7ff4c929e486..36c82a030550 100644
--- a/pkgs/development/libraries/qwt/default.nix
+++ b/pkgs/development/libraries/qwt/default.nix
@@ -42,7 +42,10 @@ stdenv.mkDerivation rec {
     description = "Qt widgets for technical applications";
     homepage = "http://qwt.sourceforge.net/";
     # LGPL 2.1 plus a few exceptions (more liberal)
-    license = lib.licenses.qwt;
+    license = with lib.licenses; [
+      lgpl21Only
+      qwtException
+    ];
     platforms = platforms.unix;
     maintainers = [ maintainers.bjornfor ];
   };