diff --git a/src/ruby/lib/grpc/generic/client_stub.rb b/src/ruby/lib/grpc/generic/client_stub.rb
index 6934257cbc0bc4ded141151d20bf3a2dbdd6ea21..d8de0beefb11680bdde07dbc0775d61909859130 100644
--- a/src/ruby/lib/grpc/generic/client_stub.rb
+++ b/src/ruby/lib/grpc/generic/client_stub.rb
@@ -84,7 +84,7 @@ module GRPC
     # channel:
     #
     # - :channel_override
-    # when present, this must be a pre-created GRPC::Channel.  If it's
+    # when present, this must be a pre-created GRPC::Core::Channel.  If it's
     # present the host and arbitrary keyword arg areignored, and the RPC
     # connection uses this channel.
     #