diff --git a/mozilla/mailnews/extensions/palmsync/src/nsAbPalmSync.cpp b/mozilla/mailnews/extensions/palmsync/src/nsAbPalmSync.cpp
index 411d7e7c081..3739fc88968 100644
--- a/mozilla/mailnews/extensions/palmsync/src/nsAbPalmSync.cpp
+++ b/mozilla/mailnews/extensions/palmsync/src/nsAbPalmSync.cpp
@@ -51,6 +51,7 @@
 #include "prdtoa.h"
 #include "nsMsgUtils.h"
 #include "nsIArray.h"
+#include "nsArrayUtils.h"
 
 #define  PREVIOUS_EXTENSION ".prev"
 #define  kPABDirectory  2 // defined in nsDirPrefs.h