diff --git a/mailnews/news/public/nsINNTPHost.h b/mailnews/news/public/nsINNTPHost.h
index b4f783681d2c..aff2439514ef 100644
--- a/mailnews/news/public/nsINNTPHost.h
+++ b/mailnews/news/public/nsINNTPHost.h
@@ -47,8 +47,8 @@ class nsINNTPHost : public nsISupports {
   NS_IMETHOD SetPushAuth(PRBool aPushAuth) = 0;
 
   /* attribute PRTime lastUpdatedTime; */
-  NS_IMETHOD GetLastUpdatedTime(PRTime *aLastUpdatedTime) = 0;
-  NS_IMETHOD SetLastUpdatedTime(PRTime aLastUpdatedTime) = 0;
+  NS_IMETHOD GetLastUpdatedTime(PRUint32 *aLastUpdatedTime) = 0;
+  NS_IMETHOD SetLastUpdatedTime(PRUint32 aLastUpdatedTime) = 0;
 
   /* nsINNTPNewsgroupList GetNewsgroupList (in string name); */
   NS_IMETHOD GetNewsgroupList(const char *name, nsINNTPNewsgroupList **retval) = 0;
diff --git a/mailnews/news/public/nsINNTPHost.idl b/mailnews/news/public/nsINNTPHost.idl
index 98423a340ecb..ca2eaad75ed8 100644
--- a/mailnews/news/public/nsINNTPHost.idl
+++ b/mailnews/news/public/nsINNTPHost.idl
@@ -32,7 +32,7 @@ interface nsINNTPHost : nsISupports {
 
     attribute boolean postingAllowed;
     attribute boolean pushAuth;
-    attribute PRTime lastUpdatedTime;
+    attribute unsigned long lastUpdatedTime;
 
     /* look up the newsgroup list for the given name */
     nsINNTPNewsgroupList GetNewsgroupList(in string name);