diff --git a/js-modules/prettify.js b/js-modules/prettify.js
index 8e8c4e31..2c46ef28 100644
--- a/js-modules/prettify.js
+++ b/js-modules/prettify.js
@@ -497,7 +497,18 @@ var prettyPrint;
       fallthroughStylePatterns.push(
           [PR_COMMENT, /^\/\*[\s\S]*?(?:\*\/|$)/, null]);
     }
-    if (options['regexLiterals']) {
+    var regexLiterals = options['regexLiterals'];
+    if (regexLiterals) {
+      /**
+       * @const
+       */
+      var regexExcls = regexLiterals > 1
+        ? ''  // Multiline regex literals
+        : '\n\r';
+      /**
+       * @const
+       */
+      var regexAny = regexExcls ? '.' : '[\\S\\s]';
       /**
        * @const
        */
@@ -505,18 +516,19 @@ var prettyPrint;
           // A regular expression literal starts with a slash that is
           // not followed by * or / so that it is not confused with
           // comments.
-          '/(?=[^/*])'
+          '/(?=[^/*' + regexExcls + '])'
           // and then contains any number of raw characters,
-          + '(?:[^/\\x5B\\x5C]'
+          + '(?:[^/\\x5B\\x5C' + regexExcls + ']'
           // escape sequences (\x5C),
-          +    '|\\x5C[\\s\\S]'
+          +    '|\\x5C' + regexAny
           // or non-nesting character sets (\x5B\x5D);
-          +    '|\\x5B(?:[^\\x5C\\x5D]|\\x5C[\\s\\S])*(?:\\x5D|$))+'
+          +    '|\\x5B(?:[^\\x5C\\x5D' + regexExcls + ']'
+          +             '|\\x5C' + regexAny + ')*(?:\\x5D|$))+'
           // finally closed by a /.
           + '/');
       fallthroughStylePatterns.push(
           ['lang-regex',
-           new RegExp('^' + REGEXP_PRECEDER_PATTERN + '(' + REGEX_LITERAL + ')')
+           RegExp('^' + REGEXP_PRECEDER_PATTERN + '(' + REGEX_LITERAL + ')')
            ]);
     }
 
@@ -728,7 +740,7 @@ var prettyPrint;
           'keywords': PERL_KEYWORDS,
           'hashComments': true,
           'multiLineStrings': true,
-          'regexLiterals': true
+          'regexLiterals': 2  // multiline regex literals
         }), ['perl', 'pl', 'pm']);
   registerLangHandler(sourceDecorator({
           'keywords': RUBY_KEYWORDS,
diff --git a/src/prettify.js b/src/prettify.js
index 5236b625..10c9fb73 100644
--- a/src/prettify.js
+++ b/src/prettify.js
@@ -852,7 +852,18 @@ var prettyPrint;
       fallthroughStylePatterns.push(
           [PR_COMMENT, /^\/\*[\s\S]*?(?:\*\/|$)/, null]);
     }
-    if (options['regexLiterals']) {
+    var regexLiterals = options['regexLiterals'];
+    if (regexLiterals) {
+      /**
+       * @const
+       */
+      var regexExcls = regexLiterals > 1
+        ? ''  // Multiline regex literals
+        : '\n\r';
+      /**
+       * @const
+       */
+      var regexAny = regexExcls ? '.' : '[\\S\\s]';
       /**
        * @const
        */
@@ -860,18 +871,19 @@ var prettyPrint;
           // A regular expression literal starts with a slash that is
           // not followed by * or / so that it is not confused with
           // comments.
-          '/(?=[^/*])'
+          '/(?=[^/*' + regexExcls + '])'
           // and then contains any number of raw characters,
-          + '(?:[^/\\x5B\\x5C]'
+          + '(?:[^/\\x5B\\x5C' + regexExcls + ']'
           // escape sequences (\x5C),
-          +    '|\\x5C[\\s\\S]'
+          +    '|\\x5C' + regexAny
           // or non-nesting character sets (\x5B\x5D);
-          +    '|\\x5B(?:[^\\x5C\\x5D]|\\x5C[\\s\\S])*(?:\\x5D|$))+'
+          +    '|\\x5B(?:[^\\x5C\\x5D' + regexExcls + ']'
+          +             '|\\x5C' + regexAny + ')*(?:\\x5D|$))+'
           // finally closed by a /.
           + '/');
       fallthroughStylePatterns.push(
           ['lang-regex',
-           new RegExp('^' + REGEXP_PRECEDER_PATTERN + '(' + REGEX_LITERAL + ')')
+           RegExp('^' + REGEXP_PRECEDER_PATTERN + '(' + REGEX_LITERAL + ')')
            ]);
     }
 
@@ -1336,7 +1348,7 @@ var prettyPrint;
           'keywords': PERL_KEYWORDS,
           'hashComments': true,
           'multiLineStrings': true,
-          'regexLiterals': true
+          'regexLiterals': 2  // multiline regex literals
         }), ['perl', 'pl', 'pm']);
   registerLangHandler(sourceDecorator({
           'keywords': RUBY_KEYWORDS,
diff --git a/src/run_prettify.js b/src/run_prettify.js
index c2fab699..dd136b92 100644
--- a/src/run_prettify.js
+++ b/src/run_prettify.js
@@ -1074,7 +1074,18 @@ var IN_GLOBAL_SCOPE = false;
           fallthroughStylePatterns.push(
               [PR_COMMENT, /^\/\*[\s\S]*?(?:\*\/|$)/, null]);
         }
-        if (options['regexLiterals']) {
+        var regexLiterals = options['regexLiterals'];
+        if (regexLiterals) {
+          /**
+           * @const
+           */
+          var regexExcls = regexLiterals > 1
+            ? ''  // Multiline regex literals
+            : '\n\r';
+          /**
+           * @const
+           */
+          var regexAny = regexExcls ? '.' : '[\\S\\s]';
           /**
            * @const
            */
@@ -1082,18 +1093,19 @@ var IN_GLOBAL_SCOPE = false;
               // A regular expression literal starts with a slash that is
               // not followed by * or / so that it is not confused with
               // comments.
-              '/(?=[^/*])'
+              '/(?=[^/*' + regexExcls + '])'
               // and then contains any number of raw characters,
-              + '(?:[^/\\x5B\\x5C]'
+              + '(?:[^/\\x5B\\x5C' + regexExcls + ']'
               // escape sequences (\x5C),
-              +    '|\\x5C[\\s\\S]'
+              +    '|\\x5C' + regexAny
               // or non-nesting character sets (\x5B\x5D);
-              +    '|\\x5B(?:[^\\x5C\\x5D]|\\x5C[\\s\\S])*(?:\\x5D|$))+'
+              +    '|\\x5B(?:[^\\x5C\\x5D' + regexExcls + ']'
+              +             '|\\x5C' + regexAny + ')*(?:\\x5D|$))+'
               // finally closed by a /.
               + '/');
           fallthroughStylePatterns.push(
               ['lang-regex',
-               new RegExp('^' + REGEXP_PRECEDER_PATTERN + '(' + REGEX_LITERAL + ')')
+               RegExp('^' + REGEXP_PRECEDER_PATTERN + '(' + REGEX_LITERAL + ')')
                ]);
         }
     
@@ -1558,7 +1570,7 @@ var IN_GLOBAL_SCOPE = false;
               'keywords': PERL_KEYWORDS,
               'hashComments': true,
               'multiLineStrings': true,
-              'regexLiterals': true
+              'regexLiterals': 2  // multiline regex literals
             }), ['perl', 'pl', 'pm']);
       registerLangHandler(sourceDecorator({
               'keywords': RUBY_KEYWORDS,