diff --git a/lib/marked.js b/lib/marked.js
index 462229d233..57d234e2e2 100644
--- a/lib/marked.js
+++ b/lib/marked.js
@@ -541,7 +541,7 @@ var inline = {
   link: /^!?\[(label)\]\(href(?:\s+(title))?\s*\)/,
   reflink: /^!?\[(label)\]\[(?!\s*\])((?:\\[\[\]]?|[^\[\]\\])+)\]/,
   nolink: /^!?\[(?!\s*\])((?:\[[^\[\]]*\]|\\[\[\]]|[^\[\]])*)\](?:\[\])?/,
-  strong: /^__([^\s])__(?!_)|^\*\*([^\s])\*\*(?!\*)|^__([^\s][\s\S]*?[^\s])__(?!_)|^\*\*([^\s][\s\S]*?[^\s])\*\*(?!\*)/,
+  strong: /^__([^\s_])__(?!_)|^\*\*([^\s*])\*\*(?!\*)|^__([^\s][\s\S]*?[^\s])__(?!_)|^\*\*([^\s][\s\S]*?[^\s])\*\*(?!\*)/,
   em: /^_([^\s_])_(?!_)|^\*([^\s*"<\[])\*(?!\*)|^_([^\s][\s\S]*?[^\s_])_(?!_|[^\spunctuation])|^_([^\s_][\s\S]*?[^\s])_(?!_|[^\spunctuation])|^\*([^\s"<\[][\s\S]*?[^\s*])\*(?!\*)|^\*([^\s*"<\[][\s\S]*?[^\s])\*(?!\*)/,
   code: /^(`+)([^`]|[^`][\s\S]*?[^`])\1(?!`)/,
   br: /^( {2,}|\\)\n(?!\s*$)/,
diff --git a/test/specs/commonmark/commonmark-spec.js b/test/specs/commonmark/commonmark-spec.js
index 7669ab3da1..4b342a4831 100644
--- a/test/specs/commonmark/commonmark-spec.js
+++ b/test/specs/commonmark/commonmark-spec.js
@@ -337,7 +337,7 @@ describe('CommonMark 0.28 Emphasis and strong emphasis', function() {
   var section = 'Emphasis and strong emphasis';
 
   // var shouldPassButFails = [];
-  var shouldPassButFails = [334, 342, 348, 349, 352, 353, 360, 368, 369, 371, 372, 378, 380, 381, 382, 387, 388, 392, 393, 394, 395, 396, 402, 403, 409, 416, 419, 420, 421, 422, 423, 424, 428, 431, 432, 433, 434, 435, 436, 443, 444, 445, 448, 449, 453, 454, 455, 457, 458];
+  var shouldPassButFails = [334, 342, 348, 349, 352, 353, 360, 368, 369, 371, 372, 378, 380, 381, 382, 387, 388, 392, 393, 394, 395, 396, 402, 403, 409, 419, 420, 421, 422, 423, 424, 431, 432, 433, 434, 435, 436, 443, 444, 445, 448, 449, 453, 454, 455, 457, 458];
 
   var willNotBeAttemptedByCoreTeam = [];