diff --git a/tools/isobuild/package-source.js b/tools/isobuild/package-source.js
index f9b8ca674f..87eb07af5f 100644
--- a/tools/isobuild/package-source.js
+++ b/tools/isobuild/package-source.js
@@ -209,7 +209,7 @@ var getExcerptFromReadme = function (text) {
   }
   var excerpt = textLines.slice(start, stop).join("\n");
 
-  // Strip the preceeding and trailing new lines.
+  // Strip the preceding and trailing new lines.
   return excerpt.replace(/^\n+|\n+$/g, "");
 };