diff --git a/xpinstall/src/nsInstall.cpp b/xpinstall/src/nsInstall.cpp
index c21dcb7e951f..1a22b59ba6b6 100644
--- a/xpinstall/src/nsInstall.cpp
+++ b/xpinstall/src/nsInstall.cpp
@@ -1216,10 +1216,9 @@ nsInstall::CurrentUserNode(nsString& userRegNode)
     int len = MAXREGNAMELEN;
     nsIPref * prefs;
     
-    nsresult rv = nsComponentManager::CreateInstance(kPrefsIID, 
-                                                     nsnull,
-                                                     kPrefsCID,
-                                                     (void**) &prefs);
+    nsresult rv = nsServiceManager::GetService(kPrefsCID, 
+                                               kPrefsIID,
+                                               (nsISupports**) &prefs);
 
 
     if ( NS_SUCCEEDED(rv) )
diff --git a/xpinstall/src/nsInstallTrigger.cpp b/xpinstall/src/nsInstallTrigger.cpp
index 8177ea8dae83..c47961a3516b 100644
--- a/xpinstall/src/nsInstallTrigger.cpp
+++ b/xpinstall/src/nsInstallTrigger.cpp
@@ -132,10 +132,9 @@ nsInstallTrigger::UpdateEnabled(PRBool* aReturn)
 {
     nsIPref * prefs;
     
-    nsresult rv = nsComponentManager::CreateInstance(kPrefsIID, 
-                                                     nsnull,
-                                                     kPrefsCID,
-                                                     (void**) &prefs);
+    nsresult rv = nsServiceManager::GetService(kPrefsCID, 
+                                               kPrefsIID,
+                                               (nsISupports**) &prefs);
 
 
     if ( NS_SUCCEEDED(rv) )