diff --git a/libavformat/asf.c b/libavformat/asf.c
index 48948f8cfc..4ce1f7f718 100644
--- a/libavformat/asf.c
+++ b/libavformat/asf.c
@@ -130,9 +130,9 @@ const ff_asf_guid ff_asf_digital_signature = {
 
 /* List of official tags at http://msdn.microsoft.com/en-us/library/dd743066(VS.85).aspx */
 const AVMetadataConv ff_asf_metadata_conv[] = {
-    { "WM/AlbumArtist", "album_artist"},
-    { "WM/AlbumTitle" , "album"     },
-    { "Author"     , "artist"    },
+    { "WM/AlbumArtist"     , "album_artist"},
+    { "WM/AlbumTitle"      , "album  "     },
+    { "Author"             , "artist"      },
     { "Description"        , "comment"     },
     { "WM/Composer"        , "composer"    },
     { "WM/EncodedBy"       , "encoded_by"  },
@@ -143,8 +143,8 @@ const AVMetadataConv ff_asf_metadata_conv[] = {
     { "WM/PartOfSet"       , "disc"        },
     { "WM/Publisher"       , "publisher"   },
     { "WM/Tool"            , "encoder"     },
-    { "WM/TrackNumber", "track"     },
+    { "WM/TrackNumber"     , "track"       },
     { "WM/Track"           , "track"       },
-//  { "Year"       , "date"      }, TODO: conversion year<->date
+//  { "Year"               , "date"        }, TODO: conversion year<->date
     { 0 }
 };