diff --git a/src/CustomElements/CustomElements.js b/src/CustomElements/CustomElements.js
index 04ce503f2..d71629dbb 100644
--- a/src/CustomElements/CustomElements.js
+++ b/src/CustomElements/CustomElements.js
@@ -7,10 +7,10 @@
  * subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
  */
 (function() {
-  
-// Estblish polyfill scope. We do this here to store flags. Flags are not 
+
+// Establish polyfill scope. We do this here to store flags. Flags are not
 // supported in the build.
-window.CustomElements = window.CustomElements || {flags:{}};  
+window.CustomElements = window.CustomElements || {flags:{}};
 
 // Flags. Convert url arguments to flags
 var flags = {};
@@ -36,7 +36,7 @@ var modules = [
   'boot.js'
 ];
 
-var src = 
+var src =
   document.querySelector('script[src*="' + file + '"]').getAttribute('src');
 var basePath = src.slice(0, src.indexOf(file));
 
@@ -44,7 +44,7 @@ modules.forEach(function(f) {
   document.write('<script src="' + basePath + f + '"></script>');
 });
 
-// exports 
+// exports
 CustomElements.flags = flags;
 
-})();
\ No newline at end of file
+})();
diff --git a/src/HTMLImports/HTMLImports.js b/src/HTMLImports/HTMLImports.js
index 9bce000b4..317cae448 100644
--- a/src/HTMLImports/HTMLImports.js
+++ b/src/HTMLImports/HTMLImports.js
@@ -8,9 +8,9 @@
  */
 (function() {
 
-// Estblish polyfill scope. We do this here to store flags. Flags are not 
+// Establish polyfill scope. We do this here to store flags. Flags are not
 // supported in the build.
-window.HTMLImports = window.HTMLImports || {flags:{}};  
+window.HTMLImports = window.HTMLImports || {flags:{}};
 
 // Flags. Convert url arguments to flags
 var flags = {};
@@ -39,7 +39,7 @@ var modules = [
   'boot.js'
 ];
 
-var src = 
+var src =
   document.querySelector('script[src*="' + file + '"]').getAttribute('src');
 var basePath = src.slice(0, src.indexOf(file));
 
@@ -47,7 +47,7 @@ modules.forEach(function(f) {
   document.write('<script src="' + basePath + f + '"></script>');
 });
 
-// exports 
+// exports
 HTMLImports.flags = flags;
 
-})();
\ No newline at end of file
+})();