diff --git a/bin/brew b/bin/brew
index f5304144d7..ccbac9dccd 100755
--- a/bin/brew
+++ b/bin/brew
@@ -204,7 +204,7 @@ PATH="/usr/bin:/bin:/usr/sbin:/sbin"
 
 FILTERED_ENV=()
 ENV_VAR_NAMES=(
-  HOME SHELL PATH TERM TERMINFO TERMINFO_DIRS COLUMNS DISPLAY LOGNAME USER CI SSH_AUTH_SOCK SUDO_ASKPASS
+  HOME SHELL PATH TERM TERMINFO TERMINFO_DIRS COLORTERM COLORFGBG COMMAND_MODE COLUMNS DISPLAY LOGNAME USER CI SSH_AUTH_SOCK SUDO_ASKPASS
   http_proxy https_proxy ftp_proxy no_proxy all_proxy HTTPS_PROXY FTP_PROXY ALL_PROXY
 )
 # Filter all but the specific variables.