diff --git a/src/tools/features/cxxstd-feature.jam b/src/tools/features/cxxstd-feature.jam
index e01115859..4494ed300 100644
--- a/src/tools/features/cxxstd-feature.jam
+++ b/src/tools/features/cxxstd-feature.jam
@@ -28,7 +28,7 @@ is supported.
 |# # end::doc[]
 
 feature.feature cxxstd
-    : 98 03 0x 11 1y 14 1z 17 2a 20 latest
+    : 98 03 0x 11 1y 14 1z 17 2a 20 2b 23 2c 26 latest
     : optional composite propagated ;
 
 #| tag::doc[]