diff --git a/apps/i2psnark/java/src/org/klomp/snark/web/BasicServlet.java b/apps/i2psnark/java/src/org/klomp/snark/web/BasicServlet.java
index 2f36c0843..c7347d96f 100644
--- a/apps/i2psnark/java/src/org/klomp/snark/web/BasicServlet.java
+++ b/apps/i2psnark/java/src/org/klomp/snark/web/BasicServlet.java
@@ -472,6 +472,8 @@ class BasicServlet extends HttpServlet
         /* ------------------------------------------------------------ */
         public InputStream getInputStream() throws IOException
         {
+            if (getContentLength() > 4*1024*1024)
+                return new BufferedInputStream(new FileInputStream(_file), 64*1024);
             return new BufferedInputStream(new FileInputStream(_file));
         }