diff --git a/lib/ace/mode/ruby_highlight_rules.js b/lib/ace/mode/ruby_highlight_rules.js
index 56f47288..69b6989d 100644
--- a/lib/ace/mode/ruby_highlight_rules.js
+++ b/lib/ace/mode/ruby_highlight_rules.js
@@ -80,12 +80,6 @@ RubyHighlightRules = function() {
             }, {
 	            token : "string.regexp",
 	            regex : "[/](?:(?:\\[(?:\\\\]|[^\\]])+\\])|(?:\\\\/|[^\\]/]))*[/]\\w*\\s*(?=[).,;]|$)"
-	        }, {
-	            token : "string", // single line
-	            regex : '["](?:(?:\\\\.)|(?:[^"\\\\]))*?["]'
-	        }, {
-	            token : "string", // single line
-	            regex : "['](?:(?:\\\\.)|(?:[^'\\\\]))*?[']"
 	        }, {
 	            token : "constant.numeric", // hex
 	            regex : "0[xX][0-9a-fA-F]+\\b"