diff --git a/srcpkgs/gcc/template b/srcpkgs/gcc/template
index 9cd9989b973..09727ef34fb 100644
--- a/srcpkgs/gcc/template
+++ b/srcpkgs/gcc/template
@@ -26,7 +26,7 @@ distfiles="
  https://gmplib.org/download/gmp/gmp-${_gmp_version}.tar.xz
  ${GNU_SITE}/mpfr/mpfr-${_mpfr_version}.tar.xz
  ${GNU_SITE}/mpc/mpc-${_mpc_version}.tar.gz
- http://isl.gforge.inria.fr/isl-${_isl_version}.tar.bz2"
+ ${SOURCEFORGE_SITE}/libisl/isl-${_isl_version}.tar.bz2"
 checksum="772cfd5d30eb9cc5a996fec9ba8cdcb45d37df1c9b5770610103b814b732c590
  258e6cd51b3fbdfc185c716d55f82c08aff57df0c6fbd143cf6ed561267a1526
  0c98a3f1732ff6ca4ea690552079da9c597872d30e96ec28414ee23c95558a7f