diff --git a/doc/maintainers.rdoc b/doc/maintainers.rdoc
index b56a3d887f..ada0fcf325 100644
--- a/doc/maintainers.rdoc
+++ b/doc/maintainers.rdoc
@@ -412,3 +412,5 @@ Yukihiro Matsumoto (matz)
   Jeremy Evans (jeremyevans0)
 [cygwin, ...]
   none. (Maintainer WANTED)
+[WebAssembly/WASI]
+  Yuta Saito (katei)