diff --git a/mozilla/xpcom/base/nsAllocator.cpp b/mozilla/xpcom/base/nsAllocator.cpp
index 776374f5907..99f8b1ebe3e 100644
--- a/mozilla/xpcom/base/nsAllocator.cpp
+++ b/mozilla/xpcom/base/nsAllocator.cpp
@@ -165,7 +165,15 @@ void* nsAllocator::Clone(const void* ptr,  PRUint32 size)
     void* p = mAllocator->Alloc(size);
     if(p) memcpy(p, ptr, size);
     return p;
-}        
+}
+
+NS_EXPORT nsIAllocator* 
+nsAllocator::GetGlobalAllocator()
+{
+    if(!EnsureAllocator()) return nsnull;
+    NS_ADDREF(mAllocator);
+    return mAllocator;
+}
 
 // private:
 
diff --git a/mozilla/xpcom/base/nsIAllocator.h b/mozilla/xpcom/base/nsIAllocator.h
index 0f5ddd37797..c458d036232 100644
--- a/mozilla/xpcom/base/nsIAllocator.h
+++ b/mozilla/xpcom/base/nsIAllocator.h
@@ -95,6 +95,7 @@ public:
     static NS_EXPORT void  Free(void* ptr);
     static NS_EXPORT void  HeapMinimize();
     static NS_EXPORT void* Clone(const void* ptr,  PRUint32 size);
+    static NS_EXPORT nsIAllocator* GetGlobalAllocator();
 private:
     nsAllocator();   // not implemented
     static PRBool EnsureAllocator() {return mAllocator || FetchAllocator();}