diff --git a/scripts/build/companion_libs/121-isl.sh b/scripts/build/companion_libs/121-isl.sh
index 1d3c0497..48b15df1 100644
--- a/scripts/build/companion_libs/121-isl.sh
+++ b/scripts/build/companion_libs/121-isl.sh
@@ -13,7 +13,8 @@ if [ "${CT_ISL}" = "y" ]; then
 # Download ISL
 do_isl_get() {
     CT_GetFile "isl-${CT_ISL_VERSION}"  \
-        ftp://ftp.linux.student.kuleuven.be/pub/people/skimo/isl/
+        ftp://ftp.linux.student.kuleuven.be/pub/people/skimo/isl/ \
+        http://mirrors.kernel.org/sources.redhat.com/gcc/infrastructure
 }
 
 # Extract ISL