1 files changed, 4 insertions, 1 deletions

diff --git a/umount.c b/umount.c
index df075f7d9..6a5e4cad8 100644
--- a/umount.c
+++ b/umount.c
@@ -142,7 +142,7 @@ char *mtab_next(void **iter)
 
 /* Don't bother to clean up, since exit() does that 
  * automagically, so we can save a few bytes */
-#if 0
+#ifdef BB_FEATURE_CLEAN_UP
 void mtab_free(void)
 {
         struct _mtab_entry_t *this, *next;
@@ -235,6 +235,9 @@ extern int umount_main(int argc, char **argv)
         if (argc < 2) {
                 usage(umount_usage);
         }
+#ifdef BB_FEATURE_CLEAN_UP
+        atexit(mtab_free);
+#endif
 
         /* Parse any options */
         while (--argc > 0 && **(++argv) == '-') {