diff --git a/Library/Homebrew/cmd/audit.rb b/Library/Homebrew/cmd/audit.rb
index 7888de5816..d73f471c03 100755
--- a/Library/Homebrew/cmd/audit.rb
+++ b/Library/Homebrew/cmd/audit.rb
@@ -265,7 +265,7 @@ def audit_formula_instance f
     end
 
     case d
-    when "git", "python", "ruby", "emacs"
+    when "git", "python", "ruby", "emacs", "mysql", "postgresql"
       problems << " * Don't use #{d} as a dependency; we allow non-Homebrew #{d} installs."
     end
   end