diff --git a/mozilla/modules/plugin/base/public/nsIClassicPluginFactory.h b/mozilla/modules/plugin/base/public/nsIClassicPluginFactory.h
index 2707a56ffed..e34db1d3668 100644
--- a/mozilla/modules/plugin/base/public/nsIClassicPluginFactory.h
+++ b/mozilla/modules/plugin/base/public/nsIClassicPluginFactory.h
@@ -63,7 +63,7 @@ public:
     * and initializes an ns4xPlugin object, and returns it in
     * <b>result</b>.
     */
-    NS_IMETHOD CreatePlugin(nsIServiceManager* aServiceMgr, const char* aFileName,
+    NS_IMETHOD CreatePlugin(nsIServiceManagerObsolete* aServiceMgr, const char* aFileName,
                             PRLibrary* aLibrary, nsIPlugin** aResult) = 0;
 };
 
diff --git a/mozilla/modules/plugin/base/src/nsPluginClassicModule.cpp b/mozilla/modules/plugin/base/src/nsPluginClassicModule.cpp
index 40ac8e66c66..88b7976b4dc 100644
--- a/mozilla/modules/plugin/base/src/nsPluginClassicModule.cpp
+++ b/mozilla/modules/plugin/base/src/nsPluginClassicModule.cpp
@@ -48,7 +48,7 @@ public:
     
     static nsresult Create(nsISupports* aOuter, REFNSIID aIID, void** aResult);
 
-    NS_IMETHOD CreatePlugin(nsIServiceManager* aServiceMgr, const char* aFileName,
+    NS_IMETHOD CreatePlugin(nsIServiceManagerObsolete* aServiceMgr, const char* aFileName,
                             PRLibrary* aLibrary, nsIPlugin** aResult);
 };
 
@@ -72,7 +72,7 @@ nsresult nsClassicPluginFactory::Create(nsISupports* aOuter, REFNSIID aIID, void
     return factory->QueryInterface(aIID, aResult);
 }
 
-NS_METHOD nsClassicPluginFactory::CreatePlugin(nsIServiceManager* aServiceMgr, const char* aFileName,
+NS_METHOD nsClassicPluginFactory::CreatePlugin(nsIServiceManagerObsolete* aServiceMgr, const char* aFileName,
                                                PRLibrary* aLibrary, nsIPlugin** aResult)
 {
     return ns4xPlugin::CreatePlugin(aServiceMgr, aFileName, aLibrary, aResult);