diff --git a/source/java/org/alfresco/web/app/servlet/BaseDownloadContentServlet.java b/source/java/org/alfresco/web/app/servlet/BaseDownloadContentServlet.java
index eac660bc75..0f4a73f1ac 100644
--- a/source/java/org/alfresco/web/app/servlet/BaseDownloadContentServlet.java
+++ b/source/java/org/alfresco/web/app/servlet/BaseDownloadContentServlet.java
@@ -274,7 +274,7 @@ public abstract class BaseDownloadContentServlet extends BaseServlet
                }
             }
             res.setDateHeader(HEADER_LAST_MODIFIED, modified.getTime());
-            res.setHeader(HEADER_CACHE_CONTROL, "must-revalidate max-age=0");
+            res.setHeader(HEADER_CACHE_CONTROL, "must-revalidate, max-age=0");
             res.setHeader(HEADER_ETAG, "\"" + Long.toString(modified.getTime()) + "\"");
          }