diff --git a/fileio.c b/fileio.c
index ba0a1d0..03fc4be 100644
--- a/fileio.c
+++ b/fileio.c
@@ -2006,6 +2006,7 @@ int do_string(__G__ length, option)   /* return PK-type error code */
     unsigned comment_bytes_left;
     unsigned int block_len;
     int error=PK_OK;
+    unsigned int length2;
 #ifdef AMIGA
     char tmp_fnote[2 * AMIGA_FILENOTELEN];   /* extra room for squozen chars */
 #endif
@@ -2292,8 +2293,12 @@ int do_string(__G__ length, option)   /* return PK-type error code */
             seek_zipf(__G__ G.cur_zipfile_bufstart - G.extra_bytes +
                       (G.inptr-G.inbuf) + length);
         } else {
-            if (readbuf(__G__ (char *)G.extra_field, length) == 0)
+            if ((length2 = readbuf(__G__ (char *)G.extra_field, length)) == 0)
                 return PK_EOF;
+            if(length2 < length) {
+              memset (__G__ (char *)G.extra_field+length2, 0 , length-length2);
+              length = length2;
+            }
             /* Looks like here is where extra fields are read */
             getZip64Data(__G__ G.extra_field, length);
 #ifdef UNICODE_SUPPORT
ca73315b3ea6b34'>refs</a><a class='active' href='/guix/log/ChangeLog'>log</a><a href='/guix/tree/ChangeLog?id=5721c0f03de384e59504f4083ca73315b3ea6b34'>tree</a><a href='/guix/commit/ChangeLog?id=5721c0f03de384e59504f4083ca73315b3ea6b34'>commit</a><a href='/guix/diff/ChangeLog?id=5721c0f03de384e59504f4083ca73315b3ea6b34'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/ChangeLog'>
<input type='hidden' name='id' value='5721c0f03de384e59504f4083ca73315b3ea6b34'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=5721c0f03de384e59504f4083ca73315b3ea6b34'>root</a>/<a href='/guix/log/ChangeLog?id=5721c0f03de384e59504f4083ca73315b3ea6b34'>ChangeLog</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/ChangeLog?id=5721c0f03de384e59504f4083ca73315b3ea6b34&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>