diff --git a/acl-2.2.51.ebuild b/acl-2.2.51.ebuild
index 5ebe946..e3b718b 100644
--- a/acl-2.2.51.ebuild
+++ b/acl-2.2.51.ebuild
@@ -46,7 +46,7 @@ src_configure() {
 	export OPTIMIZER=${CFLAGS}
 	export DEBUG=-DNDEBUG
 
-	econf \
+	CONFIG_SHELL='/bin/sh' econf \
 		$(use_enable nls gettext) \
 		--enable-shared $(use_enable static-libs static) \
 		--libexecdir="${EPREFIX}"/usr/$(get_libdir) \