undefined reference to `match_fstype'

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diff --git a/libbb/match_fstype.c b/libbb/match_fstype.c
index c792d13..32c3d7f 100644
--- a/libbb/match_fstype.c
+++ b/libbb/match_fstype.c
@@ -10,10 +10,10 @@
  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
  */

-#ifdef HAVE_MNTENT_H
-
 #include "libbb.h"

+#ifdef HAVE_MNTENT_H
+
 int FAST_FUNC match_fstype(const struct mntent *mt, const char *t_fstype)
 {
        int match = 1;