diff --git a/Library/Homebrew/cmd/audit.rb b/Library/Homebrew/cmd/audit.rb
index cb7cb2510e..4e8fd2f2e0 100755
--- a/Library/Homebrew/cmd/audit.rb
+++ b/Library/Homebrew/cmd/audit.rb
@@ -133,6 +133,10 @@ def audit_formula_text name, text
     problems << " * Use ENV instead of invoking '#{$1}' to modify the environment"
   end
 
+  if text =~ /version == ['"]HEAD['"]/
+    problems << " * Use 'ARGV.build_head?' instead of inspecting 'version'"
+  end
+
   return problems
 end