diff --git a/sdk_container/src/third_party/portage-stable/eclass/llvm-r1.eclass b/sdk_container/src/third_party/portage-stable/eclass/llvm-r1.eclass
index 8b78a43811..fc9fab75e8 100644
--- a/sdk_container/src/third_party/portage-stable/eclass/llvm-r1.eclass
+++ b/sdk_container/src/third_party/portage-stable/eclass/llvm-r1.eclass
@@ -63,7 +63,7 @@ _LLVM_OLDEST_SLOT=15
 # @DESCRIPTION:
 # The newest stable LLVM version.  Versions newer than that won't
 # be automatically enabled via USE defaults.
-_LLVM_NEWEST_STABLE=20
+_LLVM_NEWEST_STABLE=21
 
 # == control variables ==