diff --git a/Library/Homebrew/system_config.rb b/Library/Homebrew/system_config.rb
index cb5a0884a2..70c4f44484 100644
--- a/Library/Homebrew/system_config.rb
+++ b/Library/Homebrew/system_config.rb
@@ -138,7 +138,9 @@ class SystemConfig
         HOMEBREW_BOTTLE_DEFAULT_DOMAIN
         HOMEBREW_BOTTLE_DOMAIN
         HOMEBREW_BREW_FILE
+        HOMEBREW_BREW_GIT_REMOTE
         HOMEBREW_COMMAND_DEPTH
+        HOMEBREW_CORE_GIT_REMOTE
         HOMEBREW_CURL
         HOMEBREW_DISPLAY
         HOMEBREW_GIT