diff --git a/Library/Homebrew/version.rb b/Library/Homebrew/version.rb
index 159d3cb2a3..2e0bc85a53 100644
--- a/Library/Homebrew/version.rb
+++ b/Library/Homebrew/version.rb
@@ -146,6 +146,15 @@ class Version
     end
   end
 
+  SCAN_PATTERN = Regexp.union(
+    AlphaToken::PATTERN,
+    BetaToken::PATTERN,
+    RCToken::PATTERN,
+    PatchToken::PATTERN,
+    NumericToken::PATTERN,
+    StringToken::PATTERN
+  )
+
   def self.new_with_scheme(value, scheme)
     if Class === scheme && scheme.ancestors.include?(Version)
       scheme.new(value)
@@ -221,16 +230,7 @@ class Version
   end
 
   def tokenize
-    @version.scan(
-      Regexp.union(
-        AlphaToken::PATTERN,
-        BetaToken::PATTERN,
-        RCToken::PATTERN,
-        PatchToken::PATTERN,
-        NumericToken::PATTERN,
-        StringToken::PATTERN
-      )
-    ).map! do |token|
+    @version.scan(SCAN_PATTERN).map! do |token|
       case token
       when /\A#{AlphaToken::PATTERN}\z/o   then AlphaToken
       when /\A#{BetaToken::PATTERN}\z/o    then BetaToken