diff --git a/Programming/Tcl/build b/Programming/Tcl/build
index 43c6e71..1c84723 100755
--- a/Programming/Tcl/build
+++ b/Programming/Tcl/build
@@ -1,5 +1,7 @@
 #!/usr/bin/env modbuild
 
+SOURCE_URL="ftp://ftp.tcl.tk/pub/tcl/tcl8_6/tcl$V-src.tar.gz"
+
 pbuild::configure() {
 	case ${OS} in
 	Linux )
diff --git a/Programming/Tk/build b/Programming/Tk/build
index 966b97e..e6419ed 100755
--- a/Programming/Tk/build
+++ b/Programming/Tk/build
@@ -1,5 +1,7 @@
 #!/usr/bin/env modbuild
 
+SOURCE_URL="ftp://ftp.tcl.tk/pub/tcl/tcl8_6/tk$V-src.tar.gz"
+
 pbuild::configure() {
 	case ${OS} in
 	Linux )