diff --git a/sdk_container/src/third_party/coreos-overlay/profiles/coreos/base/package.unmask b/sdk_container/src/third_party/coreos-overlay/profiles/coreos/base/package.unmask
index 7fb457c8f5..22d08b96ab 100644
--- a/sdk_container/src/third_party/coreos-overlay/profiles/coreos/base/package.unmask
+++ b/sdk_container/src/third_party/coreos-overlay/profiles/coreos/base/package.unmask
@@ -1,3 +1,6 @@
 # masked in portage-stable, but is unmasked in upstream.
 # remove this when upstream portage-stable package.mask is sync'd.
 =sys-block/open-iscsi-2.0.873
+
+# masked upstream due to ancientness
+<sys-devel/binutils-2.26