diff --git a/Library/Homebrew/blacklist.rb b/Library/Homebrew/blacklist.rb
index 1d1947b4d1b2cb84580bae98896e8da77bad82f5..3141bf0aca023d754b066ffd083cf5af77c3a45c 100644
--- a/Library/Homebrew/blacklist.rb
+++ b/Library/Homebrew/blacklist.rb
@@ -75,5 +75,9 @@ def blacklisted? name
     The creator of Osmium requests that it not be packaged and that people
     use the GitHub master branch instead.
     EOS
+  when 'gfortran' then <<-EOS.undent
+    GNU Fortran is now provided as part of GCC, and can be installed with:
+      brew install gcc
+    EOS
   end
 end