diff --git a/src/pathchk.c b/src/pathchk.c
index 2e89b1c8a..f0110b57e 100644
--- a/src/pathchk.c
+++ b/src/pathchk.c
@@ -66,6 +66,7 @@ extern int errno;
 # endif /* not PATH_MAX */
 # ifndef NAME_MAX
 #  define NAME_MAX_FOR(p) pathconf_wrapper ((p), _PC_NAME_MAX);
+#  undef NEED_PATHCONF_WRAPPER
 #  define NEED_PATHCONF_WRAPPER 1
 # endif /* not NAME_MAX */