diff --git a/bfd/plugin.c b/bfd/plugin.c
index 30a4923..319ef50 100644
--- a/bfd/plugin.c
+++ b/bfd/plugin.c
@@ -251,7 +251,7 @@ bfd_plugin_object_p (bfd *abfd)
     {
       iobfd = abfd;
       file.offset = 0;
-      file.filesize = 0; /*FIXME*/
+      file.filesize = 0;
     }
 
   if (!iobfd->iostream && !bfd_open_file (iobfd))
@@ -259,8 +259,18 @@ bfd_plugin_object_p (bfd *abfd)
 
   file.fd = fileno ((FILE *) iobfd->iostream);
 
+  if (!abfd->my_archive)
+    {
+      struct stat stat_buf;
+      if (fstat (file.fd, &stat_buf))
+        return NULL;
+      file.filesize = stat_buf.st_size;
+    }
+
   file.handle = abfd;
+  off_t cur_offset = lseek(file.fd, 0, SEEK_CUR);
   claim_file (&file, &claimed);
+  lseek(file.fd, cur_offset, SEEK_SET);
   if (!claimed)
     return NULL;