diff --git a/xpfe/AppCores/src/nsAppCoresManager.cpp b/xpfe/AppCores/src/nsAppCoresManager.cpp
index 0da5903eff79..731489977d5d 100644
--- a/xpfe/AppCores/src/nsAppCoresManager.cpp
+++ b/xpfe/AppCores/src/nsAppCoresManager.cpp
@@ -18,10 +18,10 @@
  * Netscape Communications Corporation.  All Rights Reserved.
  */
 
+#include "nsAppCoresManager.h"
 
 #include "nsAppCoresCIDs.h"
 #include "nsAppCores.h"
-#include "nsAppCoresManager.h"
 #include "nsAppCoresNameSet.h"
 
 #include "nscore.h"
@@ -92,6 +92,8 @@ static NS_DEFINE_IID(kMailCoreFactoryCID,     NS_MAILCOREFACTORY_CID);
 // nsAppCoresManager
 /////////////////////////////////////////////////////////////////////////
 
+nsVoidArray nsAppCoresManager::mList;
+
 nsAppCoresManager::nsAppCoresManager()
 {
   mScriptObject   = nsnull;
diff --git a/xpfe/AppCores/src/nsAppCoresManager.h b/xpfe/AppCores/src/nsAppCoresManager.h
index c03cbdd0d3d9..5e1829f8f975 100644
--- a/xpfe/AppCores/src/nsAppCoresManager.h
+++ b/xpfe/AppCores/src/nsAppCoresManager.h
@@ -56,7 +56,7 @@ class nsAppCoresManager : public nsIScriptObjectOwner, public nsIDOMAppCoresMana
 
   private:
     void        *mScriptObject;
-    nsVoidArray  mList;
+    static nsVoidArray  mList;
 
         
 };