diff --git a/mozilla/modules/plugin/samples/simple/npsimple.cpp b/mozilla/modules/plugin/samples/simple/npsimple.cpp
index 147bebf3110..5b350f36c8c 100644
--- a/mozilla/modules/plugin/samples/simple/npsimple.cpp
+++ b/mozilla/modules/plugin/samples/simple/npsimple.cpp
@@ -322,6 +322,7 @@ public:
     NS_IMETHOD
     OnDataAvailable(nsIPluginStreamInfo* pluginInfo, 
                                             nsIInputStream* input, 
+                                            PRUint32 sourceOffset, 
                                             PRUint32 length);
 
     NS_IMETHOD
@@ -827,6 +828,7 @@ SimplePluginStreamListener::OnStartBinding(nsIPluginStreamInfo* pluginInfo)
 NS_METHOD
 SimplePluginStreamListener::OnDataAvailable(nsIPluginStreamInfo* pluginInfo, 
                                             nsIInputStream* input, 
+                                            PRUint32 sourceOffset, 
                                             PRUint32 length)
 {
 #ifdef NS_DEBUG
diff --git a/mozilla/modules/plugin/test/npsimple.cpp b/mozilla/modules/plugin/test/npsimple.cpp
index 147bebf3110..5b350f36c8c 100644
--- a/mozilla/modules/plugin/test/npsimple.cpp
+++ b/mozilla/modules/plugin/test/npsimple.cpp
@@ -322,6 +322,7 @@ public:
     NS_IMETHOD
     OnDataAvailable(nsIPluginStreamInfo* pluginInfo, 
                                             nsIInputStream* input, 
+                                            PRUint32 sourceOffset, 
                                             PRUint32 length);
 
     NS_IMETHOD
@@ -827,6 +828,7 @@ SimplePluginStreamListener::OnStartBinding(nsIPluginStreamInfo* pluginInfo)
 NS_METHOD
 SimplePluginStreamListener::OnDataAvailable(nsIPluginStreamInfo* pluginInfo, 
                                             nsIInputStream* input, 
+                                            PRUint32 sourceOffset, 
                                             PRUint32 length)
 {
 #ifdef NS_DEBUG