diff --git a/gnu/packages/tmux.scm b/gnu/packages/tmux.scm
index 191e606cf6..c1e136915b 100644
--- a/gnu/packages/tmux.scm
+++ b/gnu/packages/tmux.scm
@@ -90,8 +90,7 @@ (define-public tmux-themepack
       (home-page "https://github.com/jimeh/tmux-themepack")
       (synopsis "Collection of themes for Tmux")
       (description "A collection of various themes for Tmux.")
-      (license
-       (non-copyleft "http://www.wtfpl.net/txt/copying/")))))
+      (license license:wtfpl2))))
 
 (define-public tmuxifier
   (package