diff --git a/src/feature.h b/src/feature.h
index ba61fa2..ca180dd 100644
--- a/src/feature.h
+++ b/src/feature.h
@@ -715,19 +715,31 @@
 
 /*
  * File names for:
- * FILETYPE_FILE	switch on file type detection
- * FTPLUGIN_FILE	switch on loading filetype plugin files
- * INDENT_FILE		switch on loading indent files
- * FTOFF_FILE		switch off file type detection
- * FTPLUGOF_FILE	switch off loading settings files
- * INDOFF_FILE		switch off loading indent files
+ * FILETYPE_FILE	used for file type detection
+ * FTPLUGIN_FILE	used for loading filetype plugin files
+ * INDENT_FILE		used for loading indent files
+ * FTOFF_FILE		used for file type detection
+ * FTPLUGOF_FILE	used for loading settings files
+ * INDOFF_FILE		used for loading indent files
  */
-// # define FILETYPE_FILE	"filetype.vim"
-// # define FTPLUGIN_FILE	"ftplugin.vim"
-// # define INDENT_FILE		"indent.vim"
-// # define FTOFF_FILE		"ftoff.vim"
-// # define FTPLUGOF_FILE	"ftplugof.vim"
-// # define INDOFF_FILE		"indoff.vim"
+#ifndef FILETYPE_FILE
+# define FILETYPE_FILE		"filetype.vim"
+#endif
+#ifndef FTPLUGIN_FILE
+# define FTPLUGIN_FILE		"ftplugin.vim"
+#endif
+#ifndef INDENT_FILE
+# define INDENT_FILE		"indent.vim"
+#endif
+#ifndef FTOFF_FILE
+# define FTOFF_FILE		"ftoff.vim"
+#endif
+#ifndef FTPLUGOF_FILE
+# define FTPLUGOF_FILE		"ftplugof.vim"
+#endif
+#ifndef INDOFF_FILE
+# define INDOFF_FILE		"indoff.vim"
+#endif
 
 /*
  * SYS_MENU_FILE	Name of the default menu.vim file.