diff --git a/mozilla/xpcom/io/nsLocalFileUnix.cpp b/mozilla/xpcom/io/nsLocalFileUnix.cpp
index 0a465892140..2b8cf06c100 100644
--- a/mozilla/xpcom/io/nsLocalFileUnix.cpp
+++ b/mozilla/xpcom/io/nsLocalFileUnix.cpp
@@ -1063,12 +1063,9 @@ nsLocalFile::GetFileSize(PRInt64 *aFileSize)
     }
 #endif
 
+    /* XXX autoconf for and use stat64 if available */
     if (!S_ISDIR(mCachedStat.st_mode)) {
-#ifdef STAT_IS_64
-        *aFileSize = mCachedStat.st_size;
-#else
         LL_UI2L(*aFileSize, (PRUint32)mCachedStat.st_size);
-#endif
     }
     return NS_OK;
 }
diff --git a/mozilla/xpcom/io/nsLocalFileUnix.h b/mozilla/xpcom/io/nsLocalFileUnix.h
index 8eaa7814e8b..b9434d8bcb2 100644
--- a/mozilla/xpcom/io/nsLocalFileUnix.h
+++ b/mozilla/xpcom/io/nsLocalFileUnix.h
@@ -65,15 +65,6 @@
     #include <sys/mount.h>
 #endif
 
-// 64-bit stat
-#if defined(HAVE_STAT64) && defined(HAVE_LSTAT64)
-#    undef stat
-#    undef lstat
-#    define stat stat64
-#    define lstat lstat64
-#    define STAT_IS_64
-#endif
-
 class NS_COM nsLocalFile : public nsILocalFile
 {
 public: