diff --git a/dev-build/automake/automake-1.16.90.ebuild b/dev-build/automake/automake-1.16.90.ebuild
index 99d1c3dc731d3..ac793c1acd3d6 100644
--- a/dev-build/automake/automake-1.16.90.ebuild
+++ b/dev-build/automake/automake-1.16.90.ebuild
@@ -62,6 +62,8 @@ BDEPEND="
 	test? (
 		${PYTHON_DEPS}
 		dev-util/dejagnu
+		sys-devel/bison
+		sys-devel/flex
 	)
 	verify-sig? ( sec-keys/openpgp-keys-jimmeyering )
 "
diff --git a/dev-build/automake/automake-9999.ebuild b/dev-build/automake/automake-9999.ebuild
index 99d1c3dc731d3..ac793c1acd3d6 100644
--- a/dev-build/automake/automake-9999.ebuild
+++ b/dev-build/automake/automake-9999.ebuild
@@ -62,6 +62,8 @@ BDEPEND="
 	test? (
 		${PYTHON_DEPS}
 		dev-util/dejagnu
+		sys-devel/bison
+		sys-devel/flex
 	)
 	verify-sig? ( sec-keys/openpgp-keys-jimmeyering )
 "