diff --git a/mozilla/security/nss/lib/jar/jarevil.c b/mozilla/security/nss/lib/jar/jarevil.c
index 08fa1ee6cde..8ceba9d3c5b 100644
--- a/mozilla/security/nss/lib/jar/jarevil.c
+++ b/mozilla/security/nss/lib/jar/jarevil.c
@@ -57,7 +57,7 @@ extern void *mozilla_event_queue;
 
 
 /* Special macros facilitate running on Win 16 */
-#if defined(XP_PC) && !defined(_WIN32)   /* then we are win 16 */ 
+#if defined(XP_WIN16)
 
   /* 
    * Allocate the data passed to the callback functions from the heap...