diff --git a/src/closure-externs/closure-externs.js b/src/closure-externs/closure-externs.js
index 66f79e7d2a36e..99f417710e6d5 100644
--- a/src/closure-externs/closure-externs.js
+++ b/src/closure-externs/closure-externs.js
@@ -268,6 +268,3 @@ Navigator.prototype.webkitGetUserMedia = function(
  * @type {symbol}
  */
 Symbol.dispose;
-
-// Common between node-externs and v8-externs
-var os = {};
diff --git a/src/closure-externs/v8-externs.js b/src/closure-externs/v8-externs.js
index 4f602ac2cdc82..adcb108df3e83 100644
--- a/src/closure-externs/v8-externs.js
+++ b/src/closure-externs/v8-externs.js
@@ -33,6 +33,11 @@ var scriptArgs = [];
  */
 var quit = function(status) {};
 
+/**
+ * @suppress {duplicate}
+ */
+var os;
+
 /**
  * @param {string} cmd
  * @param {Array.<string>=} args
diff --git a/third_party/closure-compiler/node-externs/os.js b/third_party/closure-compiler/node-externs/os.js
index fabf75e27da69..c0cdeff95d171 100644
--- a/third_party/closure-compiler/node-externs/os.js
+++ b/third_party/closure-compiler/node-externs/os.js
@@ -27,6 +27,7 @@
  END_NODE_INCLUDE
  */
     
+var os = {};
 
 /**
  * @return {string}