diff --git a/mail-filter/rblcheck/rblcheck-1.5-r3.ebuild b/mail-filter/rblcheck/rblcheck-1.5-r3.ebuild
index 439ac7260f9fb..225bf9882b5db 100644
--- a/mail-filter/rblcheck/rblcheck-1.5-r3.ebuild
+++ b/mail-filter/rblcheck/rblcheck-1.5-r3.ebuild
@@ -13,6 +13,8 @@ LICENSE="GPL-2"
 SLOT="0"
 KEYWORDS="~alpha amd64 ~hppa ~mips ppc sparc x86"
 
+RDEPEND="!net-libs/udns[tools]"
+
 PATCHES=(
 	"${FILESDIR}"/${P}-autoconf.patch
 )