diff --git a/configure.ac b/configure.ac
index 87a00ccbd..3327e7200 100644
--- a/configure.ac
+++ b/configure.ac
@@ -59,7 +59,7 @@ fi
 
 AC_HEADER_STDC
 AC_HEADER_TIME
-AC_CHECK_FUNCS([lrintf strlcpy daemon dirname basename daemon strcasecmp])
+AC_CHECK_FUNCS([lrintf strlcpy daemon dirname basename daemon strcasecmp localtime_r])
 AC_PROG_INSTALL
 AC_PROG_MAKE_SET
 ACX_PTHREAD