diff --git a/lib/less/parser.js b/lib/less/parser.js
index ade19d15c..7c2959e33 100644
--- a/lib/less/parser.js
+++ b/lib/less/parser.js
@@ -313,7 +313,7 @@ less.Parser = function Parser(env) {
                 var j = 0,
                     skip = /(?:@\{[\w-]+\}|[^"'`\{\}\/\(\)\\])+/g,
                     comment = /\/\*(?:[^*]|\*+[^\/*])*\*+\/|\/\/.*/g,
-                    string = /"((?:[^"\\\r\n]|\\.)*)"|'((?:[^'\\\r\n]|\\.)*)'|`((?:[^`]|\\.)*)`/g,
+                    string = /(('''|""")(.|\n)*?\2)|"((?:[^"\\\r\n]|\\.)*)"|'((?:[^'\\\r\n]|\\.)*)'|`((?:[^`]|\\.)*)`/g,
                     level = 0,
                     match,
                     chunk = chunks[0],
@@ -644,9 +644,17 @@ less.Parser = function Parser(env) {
                     if (input.charAt(j) !== '"' && input.charAt(j) !== "'") { return; }
 
                     e && $('~');
+                    
+                    var multiline = input.substring(j, j + 3),
+                        rgx;
+                        
+                    rgx = multiline === '"""' || multiline === "'''"
+                        ? /^('''|""")((.|\n)*?)\1/
+                        :/^"((?:[^"\\\r\n]|\\.)*)"|'((?:[^'\\\r\n]|\\.)*)'/
+                        ;
 
-                    if (str = $(/^"((?:[^"\\\r\n]|\\.)*)"|'((?:[^'\\\r\n]|\\.)*)'/)) {
-                        return new(tree.Quoted)(str[0], str[1] || str[2], e, index, env.currentFileInfo);
+                    if (str = $(rgx)) {
+                        return new(tree.Quoted)(str[0], str[2] || str[1], e, index, env.currentFileInfo);
                     }
                 },
 
diff --git a/test/css/strings.css b/test/css/strings.css
index cd6d60202..10658dda4 100644
--- a/test/css/strings.css
+++ b/test/css/strings.css
@@ -41,3 +41,14 @@
 .watermark {
   family: Univers, Arial, Verdana, San-Serif;
 }
+.multiline {
+  content: 'foo
+  bar
+  ';
+}
+.multiline-value-interpolated {
+  content: foo
+  xfoo
+  bar
+  ;
+}
diff --git a/test/less/strings.less b/test/less/strings.less
index c43e368dd..f195fe0bd 100644
--- a/test/less/strings.less
+++ b/test/less/strings.less
@@ -55,3 +55,17 @@
   @family: ~"Univers, @{test}";
   family: @family;
 }
+
+.multiline {
+  content: '''foo
+  bar
+  ''';
+}
+
+@multi_foo: 'xfoo';
+.multiline-value-interpolated {
+  content: ~'''foo
+  @{multi_foo}
+  bar
+  ''';
+}
\ No newline at end of file