diff --git a/gnu/packages/haskell-check.scm b/gnu/packages/haskell-check.scm
index 2d72a04233..28ed00db03 100644
--- a/gnu/packages/haskell-check.scm
+++ b/gnu/packages/haskell-check.scm
@@ -147,10 +147,10 @@ (define-public ghc-tasty-golden
      "https://github.com/feuerbach/tasty-golden")
     (synopsis "Golden tests support for tasty")
     (description
-     "This package provides support for 'golden testing'.  A golden test is an
-IO action that writes its result to a file.  To pass the test, this output
-file should be identical to the corresponding 'golden' file, which contains
-the correct result for the test.")
+     "This package provides support for 'golden testing'.  A @dfn{golden test}
+is an IO action that writes its result to a file.  To pass the test, this
+output file should be identical to the corresponding 'golden' file, which
+contains the correct result for the test.")
     (license license:expat)))
 
 ;; This package builds `clock` without tests, since the tests rely on tasty