diff --git a/plugin_gems.rb b/plugin_gems.rb
index 6f9eaf8e..d58201f5 100644
--- a/plugin_gems.rb
+++ b/plugin_gems.rb
@@ -13,6 +13,9 @@
 download "webhdfs", "0.8.0"
 download "fluent-plugin-webhdfs", "1.2.3"
 download "fluent-plugin-rewrite-tag-filter", "2.2.0"
+# This should be the last released version of the gem in https://rubygems.org/gems/fluent-plugin-google-cloud.
+# The release candidate build will overwrite this gem with a gem version that is built from the master branch
+# later in the build pipeline.
 download "fluent-plugin-google-cloud", "0.12.11"
 download "fluent-plugin-detect-exceptions", "0.0.15"
 # Keep this version compatible with