diff --git a/toolkit/components/maintenanceservice/serviceinstall.cpp b/toolkit/components/maintenanceservice/serviceinstall.cpp
index ef825f78ddd..fda3e7bbd0b 100644
--- a/toolkit/components/maintenanceservice/serviceinstall.cpp
+++ b/toolkit/components/maintenanceservice/serviceinstall.cpp
@@ -11,7 +11,7 @@
 #include <lm.h>
 
 #include <nsWindowsHelpers.h>
-#include "mozilla/Scoped.h"
+#include "mozilla/UniquePtr.h"
 
 #include "serviceinstall.h"
 #include "servicebase.h"
@@ -64,7 +64,7 @@ GetVersionNumberFromPath(LPWSTR path, DWORD &A, DWORD &B,
                          DWORD &C, DWORD &D) 
 {
   DWORD fileVersionInfoSize = GetFileVersionInfoSizeW(path, 0);
-  mozilla::ScopedDeleteArray<char> fileVersionInfo(new char[fileVersionInfoSize]);
+  mozilla::UniquePtr<char[]> fileVersionInfo(new char[fileVersionInfoSize]);
   if (!GetFileVersionInfoW(path, 0, fileVersionInfoSize,
                            fileVersionInfo.get())) {
       LOG_WARN(("Could not obtain file info of old service.  (%d)", 
@@ -285,7 +285,7 @@ SvcInstall(SvcInstallAction action)
 
     // Get the service config information, in particular we want the binary 
     // path of the service.
-    mozilla::ScopedDeleteArray<char> serviceConfigBuffer(new char[bytesNeeded]);
+    mozilla::UniquePtr<char[]> serviceConfigBuffer(new char[bytesNeeded]);
     if (!QueryServiceConfigW(schService, 
         reinterpret_cast<QUERY_SERVICE_CONFIGW*>(serviceConfigBuffer.get()), 
         bytesNeeded, &bytesNeeded)) {