diff --git a/lib/liquid/lexer.rb b/lib/liquid/lexer.rb
index c2adec78..4e8d3d6e 100644
--- a/lib/liquid/lexer.rb
+++ b/lib/liquid/lexer.rb
@@ -164,7 +164,7 @@ module Liquid
     end
 
     def initialize(input)
-      @ss = Lexer2.string_scanner
+      @ss = self.class.string_scanner
       @ss.string = input
     end
 
diff --git a/lib/liquid/tokenizer.rb b/lib/liquid/tokenizer.rb
index 0bb05c73..8920a514 100644
--- a/lib/liquid/tokenizer.rb
+++ b/lib/liquid/tokenizer.rb
@@ -91,7 +91,7 @@ module Liquid
       if @for_liquid_tag
         @tokens = @source.split("\n")
       else
-        @ss = Tokenizer2.string_scanner
+        @ss = self.class.string_scanner
         @ss.string = @source
         @tokens << shift_normal until @ss.eos?
       end