diff --git a/envjs/xhr.js b/envjs/xhr.js
index 4d659bff..f8296d6b 100644
--- a/envjs/xhr.js
+++ b/envjs/xhr.js
@@ -541,7 +541,7 @@ XMLHttpRequest.prototype = {
             throw new Error("INVALID_STATE_ERR");
         } else {
             for (header in this.responseHeaders) {
-                if(this.responseHeader.hasOwnProperty(header)){
+                if(this.responseHeaders.hasOwnProperty(header)){
                     returnedHeaders.push( header + ": " + this.responseHeaders[header] );
                 }
             }