diff --git a/src/emitter.js b/src/emitter.js
index c664aa8..43543e1 100644
--- a/src/emitter.js
+++ b/src/emitter.js
@@ -135,7 +135,7 @@ PEG.compiler.emitter = function(ast) {
         "      function escape(ch) {",
         "        var charCode = ch.charCodeAt(0);",
         "        ",
-        "        if (charCode < 0xFF) {",
+        "        if (charCode <= 0xFF) {",
         "          var escapeChar = 'x';",
         "          var length = 2;",
         "        } else {",
diff --git a/src/parser.js b/src/parser.js
index 443af39..55f06cd 100644
--- a/src/parser.js
+++ b/src/parser.js
@@ -29,7 +29,7 @@ PEG.parser = (function(){
       function escape(ch) {
         var charCode = ch.charCodeAt(0);
         
-        if (charCode < 0xFF) {
+        if (charCode <= 0xFF) {
           var escapeChar = 'x';
           var length = 2;
         } else {
diff --git a/src/utils.js b/src/utils.js
index b705142..5a6f869 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -61,7 +61,7 @@ function padLeft(input, padding, length) {
 function escape(ch) {
   var charCode = ch.charCodeAt(0);
 
-  if (charCode < 0xFF) {
+  if (charCode <= 0xFF) {
     var escapeChar = 'x';
     var length = 2;
   } else {