diff --git a/core/isl/PKGBUILD b/core/isl/PKGBUILD
index fcd8f28c3..57229f35b 100644
--- a/core/isl/PKGBUILD
+++ b/core/isl/PKGBUILD
@@ -8,10 +8,11 @@ noautobuild=1
 
 pkgname=isl
 pkgver=0.11.1
-pkgrel=1
+pkgrel=2
 pkgdesc="Library for manipulating sets and relations of integer points bounded by linear constraints"
 arch=('i686' 'x86_64')
 url="http://www.kotnet.org/~skimo/isl/"
+depends=('gmp')
 license=('MIT')
 options=('!libtool')
 source=(http://www.kotnet.org/~skimo/isl/$pkgname-$pkgver.tar.bz2)