diff --git a/m4/withfts.m4 b/m4/withfts.m4
index 5462f4ba..fe52e9be 100644
--- a/m4/withfts.m4
+++ b/m4/withfts.m4
@@ -1,4 +1,4 @@
-AC_DEFUN(FIND_WITH_FTS,
+AC_DEFUN([FIND_WITH_FTS],
 [AC_ARG_WITH(fts,
 [  --with-fts         	  Use fts() to search the filesystem],[])
 AC_DEFINE(WITH_FTS, 1, [Define if you want to use fts() to do the filesystem search.])