diff --git a/src/cssjanus.js b/src/cssjanus.js
index aa17c3d..e092d6a 100644
--- a/src/cssjanus.js
+++ b/src/cssjanus.js
@@ -119,7 +119,7 @@ function CSSJanus() {
 		colorPattern = '(#?' + nmcharPattern + '+|(?:rgba?|hsla?)\\([ \\d.,%-]+\\))',
 		urlCharsPattern = '(?:' + urlSpecialCharsPattern + '|' + nonAsciiPattern + '|' + escapePattern + ')*',
 		lookAheadNotLetterPattern = '(?![a-zA-Z])',
-		lookAheadNotOpenBracePattern = '(?!(' + nmcharPattern + '|\\r?\\n|\\s|#|\\:|\\.|\\,|\\+|>|\\(|\\)|\\[|\\]|=|\\*=|~=|\\^=|\'[^\']*\'])*?{)',
+		lookAheadNotOpenBracePattern = '(?!(' + nmcharPattern + '|\\r?\\n|\\s|#|\\:|\\.|\\,|\\+|>|\\(|\\)|\\[|\\]|=|\\*=|~=|\\^=|\'[^\']*\'|"[^"]*"|' + commentToken + ')*?{)',
 		lookAheadNotClosingParenPattern = '(?!' + urlCharsPattern + '?' + validAfterUriCharsPattern + '\\))',
 		lookAheadForClosingParenPattern = '(?=' + urlCharsPattern + '?' + validAfterUriCharsPattern + '\\))',
 		suffixPattern = '(\\s*(?:!important\\s*)?[;}])',
diff --git a/test/data.json b/test/data.json
index b1c9927..01f193d 100644
--- a/test/data.json
+++ b/test/data.json
@@ -754,6 +754,12 @@
 			],
 			[
 				".a-foo.png { width: 0; }"
+			],
+			[
+				".foo-left /* comment */ { color: red; }"
+			],
+			[
+				"[class*=\"span\"].pull-right,.row-fluid [class*=\"span\"].pull-right { color: red; }"
 			]
 		]
 	},