diff --git a/hosts b/hosts
index 5a80737..aec082e 100755
--- a/hosts
+++ b/hosts
@@ -38,11 +38,12 @@ IFS=$'\n\t'
 
 _VERSION="2.3.1"
 
-# DEFAULT_COMMAND
+# $HOSTS_DEFAULT_COMMAND
 #
 # The command to be run by default, when no command name is specified. If the
-# environment has an existing $DEFAULT_COMMAND set, then that value is used.
-DEFAULT_COMMAND="${DEFAULT_COMMAND:-list}"
+# environment has an existing `$HOSTS_DEFAULT_COMMAND` set, then that value is
+# used.
+HOSTS_DEFAULT_COMMAND="${HOSTS_DEFAULT_COMMAND:-list}"
 
 # HOSTS_PATH
 #
@@ -358,10 +359,10 @@ _main() {
   _debug printf "main(): entering...\n"
   _debug printf "main() \${_CMD} (upon entering): %s\n" "${_CMD}"
 
-  # If $_CMD is blank, then set to `$DEFAULT_COMMAND`
+  # If $_CMD is blank, then set to `$HOSTS_DEFAULT_COMMAND`
   if [[ -z ${_CMD} ]]
   then
-    _CMD="${DEFAULT_COMMAND}"
+    _CMD="${HOSTS_DEFAULT_COMMAND}"
   fi
 
   # Load all of the commands.
@@ -377,7 +378,7 @@ _main() {
     _parameters+=("${_CMD}")
     _parameters+=(${_COMMAND_PARAMETERS[@]:-})
 
-    "${DEFAULT_COMMAND}" "${_parameters[@]:-}"
+    "${HOSTS_DEFAULT_COMMAND}" "${_parameters[@]:-}"
   fi
 }