diff --git a/Library/Homebrew/cmd/doctor.rb b/Library/Homebrew/cmd/doctor.rb
index 72b64cf29744eeaad8adb08bc769f4225af0d8c7..7fe73329097719d7b4c2566c187eb788a1084e06 100644
--- a/Library/Homebrew/cmd/doctor.rb
+++ b/Library/Homebrew/cmd/doctor.rb
@@ -744,6 +744,7 @@ module Homebrew extend self
 
     unless (warnings = output.string).chomp.empty?
       puts warnings
+      exit 1
     else
       puts "Your OS X is ripe for brewing."
       puts "Any troubles you may be experiencing are likely purely psychosomatic."