diff --git a/mozilla/modules/plugin/base/src/ns4xPluginInstance.cpp b/mozilla/modules/plugin/base/src/ns4xPluginInstance.cpp
index b065c7f4727..9eaa81b24aa 100644
--- a/mozilla/modules/plugin/base/src/ns4xPluginInstance.cpp
+++ b/mozilla/modules/plugin/base/src/ns4xPluginInstance.cpp
@@ -255,9 +255,6 @@ ns4xPluginStreamListener::OnStartBinding(nsIPluginStreamInfo* pluginInfo)
 
   mStreamInfo = pluginInfo;
 
-  // if we don't know the end of the stream, use 0 instead of -1. bug 59571
-  if (mNPStream.end == -1)
-    mNPStream.end = 0;
 
   NS_TRY_SAFE_CALL_RETURN(error, CallNPP_NewStreamProc(callbacks->newstream,
                                                        npp,
diff --git a/mozilla/modules/plugin/base/src/nsPluginHostImpl.cpp b/mozilla/modules/plugin/base/src/nsPluginHostImpl.cpp
index fb7b46a166c..5e23ae3c531 100644
--- a/mozilla/modules/plugin/base/src/nsPluginHostImpl.cpp
+++ b/mozilla/modules/plugin/base/src/nsPluginHostImpl.cpp
@@ -2247,7 +2247,7 @@ nsPluginStreamListenerPeer::OnStartRequest(nsIRequest *request, nsISupports* aCo
   // it's possible for the server to not send a Content-Length.  We should
   // still work in this case.
   if (NS_FAILED(rv)) {
-    mPluginStreamInfo->SetLength(PRUint32(-1));
+    mPluginStreamInfo->SetLength(PRUint32(0));
   }
   else {
     mPluginStreamInfo->SetLength(length);