diff --git a/Library/Homebrew/formula_versions.rb b/Library/Homebrew/formula_versions.rb
index d83a0aae65..9c0e97aa3c 100644
--- a/Library/Homebrew/formula_versions.rb
+++ b/Library/Homebrew/formula_versions.rb
@@ -59,7 +59,8 @@ class FormulaVersions
     map = Hash.new { |h, k| h[k] = [] }
     rev_list(branch) do |rev|
       formula_at_revision(rev) do |f|
-        map[f.version] << f.revision
+        map[f.stable.version] << f.revision if f.stable
+        map[f.devel.version] << f.revision if f.devel
       end
     end
     map