diff --git a/lib/http.js b/lib/http.js
index af6a40932b0..8313c8cc648 100644
--- a/lib/http.js
+++ b/lib/http.js
@@ -261,6 +261,7 @@ IncomingMessage.prototype._addHeaderLine = function(field, value) {
     case 'accept-language':
     case 'connection':
     case 'cookie':
+    case 'pragma':
       if (field in dest) {
         dest[field] += ', ' + value;
       } else {