diff --git a/sys-process/at/at-3.2.5.ebuild b/sys-process/at/at-3.2.5.ebuild
index e00f84a7515f6..e4fbd3d6f641f 100644
--- a/sys-process/at/at-3.2.5.ebuild
+++ b/sys-process/at/at-3.2.5.ebuild
@@ -31,7 +31,7 @@ RDEPEND="${DEPEND}
 "
 BDEPEND="
 	>=sys-devel/autoconf-2.64
-	sys-devel/bison
+	app-alternatives/yacc
 	app-alternatives/lex
 "