diff --git a/src/ChangeLog b/src/ChangeLog
index 30b6c9cc..5c8dea7a 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,8 @@
+2010-07-20  Alan Jenkins <alan-jenkins@tuffmail.co.uk> (tiny change)
+
+	* http.c (gethttp): Check content-length was set before trying to
+	compare it with the already downloded filesize.
+
 2010-07-20  Leonid Petrov <nouser@lpetrov.net>
 
 	* ftp.c (getftp): Don't attempt to retrieve the file if it is already
diff --git a/src/http.c b/src/http.c
index 28fd24f9..1c1e165c 100644
--- a/src/http.c
+++ b/src/http.c
@@ -2377,7 +2377,7 @@ File %s already there; not retrieving.\n\n"), quote (hs->local_file));
 
   if (statcode == HTTP_STATUS_RANGE_NOT_SATISFIABLE
       || (!opt.timestamping && hs->restval > 0 && statcode == HTTP_STATUS_OK
-          && contrange == 0 && hs->restval >= contlen))
+          && contrange == 0 && contlen >= 0 && hs->restval >= contlen))
     {
       /* If `-c' is in use and the file has been fully downloaded (or
          the remote file has shrunk), Wget effectively requests bytes