diff --git a/Library/Homebrew/version/null.rb b/Library/Homebrew/version/null.rb
index 65e3d56c09..9549ba3284 100644
--- a/Library/Homebrew/version/null.rb
+++ b/Library/Homebrew/version/null.rb
@@ -30,6 +30,10 @@ class Version
       Float::NAN
     end
 
+    def to_i
+      0
+    end
+
     def to_s
       ""
     end