diff --git a/lib/net/http/header.rb b/lib/net/http/header.rb
index 623a144350..1f795d7d9d 100644
--- a/lib/net/http/header.rb
+++ b/lib/net/http/header.rb
@@ -218,7 +218,7 @@ def each_capitalized
   alias canonical_each each_capitalized
 
   def capitalize(name)
-    name.to_s.split(/-/).map {|s| s.capitalize }.join('-')
+    name.to_s.split('-').map {|s| s.capitalize }.join('-')
   end
   private :capitalize
 
@@ -239,7 +239,7 @@ def range
     end
 
     byte_range_set = $1
-    result = byte_range_set.split(/,/).map {|spec|
+    result = byte_range_set.split(',').map {|spec|
       m = /(\d+)?\s*-\s*(\d+)?/i.match(spec) or
               raise Net::HTTPHeaderSyntaxError, "invalid byte-range-spec: '#{spec}'"
       d1 = m[1].to_i