diff --git a/tk.spec b/tk.spec
index 7bf20b8..9cde480 100644
--- a/tk.spec
+++ b/tk.spec
@@ -44,7 +44,7 @@ Provides:       wish8.6
 Requires:       tcl >= %version
 Requires:       xhost
 PreReq:         /bin/rm
-Source0:        https://prdownloads.sourceforge.net/tcl/tk8.6.7-src.tar.gz
+Source0:        ftp://ftp.tcl.tk/pub/tcl/tcl8_6/%name%{version}%{rrc}-src.tar.gz
 Source1:        tk-rpmlintrc
 Source2:        baselibs.conf
 Source3:        http://tkcon.cvs.sourceforge.net/tkcon/tkcon/tkcon.tcl