1 files changed, 1 insertions, 1 deletions

diff --git a/src/config.in b/src/config.in
index d91b36e5e11..1dd85c9b5cc 100644
--- a/src/config.in
+++ b/src/config.in
@@ -193,7 +193,7 @@ Boston, MA 02111-1307, USA.  */
 #undef HAVE_AIX_SMT_EXP
 
 #undef HAVE_MKTIME
-#if HAVE_MKTIME && ! defined (_NEXT_SOURCE)
+#if ! HAVE_MKTIME || defined (_NEXT_SOURCE)
 #define mktime emacs_mktime
 #endif