diff --git a/autoload/zencoding.vim b/autoload/zencoding.vim
index 9d1c5a1..7d27e1b 100644
--- a/autoload/zencoding.vim
+++ b/autoload/zencoding.vim
@@ -1,7 +1,7 @@
 "=============================================================================
 " zencoding.vim
 " Author: Yasuhiro Matsumoto <mattn.jp@gmail.com>
-" Last Change: 14-Jan-2011.
+" Last Change: 25-Jan-2011.
 
 let s:save_cpo = &cpo
 set cpo&vim
@@ -784,8 +784,8 @@ function! zencoding#imageSize()
   endif
   if hex =~ '^47494638'
     let type = 'gif'
-    let width = eval('0x'.hex[18:19].hex[16:17])
-    let height = eval('0x'.hex[14:15].hex[12:13])
+    let width = eval('0x'.hex[14:15].hex[12:13])
+    let height = eval('0x'.hex[18:19].hex[16:17])
   endif
 
   if width == -1 && height == -1