diff --git a/Library/Homebrew/env_config.rb b/Library/Homebrew/env_config.rb
index e3cfc9d716..a7e5720be0 100644
--- a/Library/Homebrew/env_config.rb
+++ b/Library/Homebrew/env_config.rb
@@ -345,7 +345,7 @@ module Homebrew
         boolean:     true,
       },
       HOMEBREW_UPGRADE_GREEDY:                   {
-        description: "If set, run `--greedy` with all upgrade commands",
+        description: "If set, run `--greedy` with all upgrade commands.",
         boolean:     true,
       },
       HOMEBREW_SIMULATE_MACOS_ON_LINUX:          {