diff --git a/m4/gettime.m4 b/m4/gettime.m4
index 4a7f137f8..0ae4c3908 100644
--- a/m4/gettime.m4
+++ b/m4/gettime.m4
@@ -1,4 +1,4 @@
-# gettime.m4 serial 4
+# gettime.m4 serial 5
 dnl Copyright (C) 2002, 2004, 2005 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -12,5 +12,5 @@ AC_DEFUN([gl_GETTIME],
   dnl Prerequisites of lib/gettime.c.
   AC_REQUIRE([gl_CLOCK_TIME])
   AC_REQUIRE([gl_TIMESPEC])
-  AC_CHECK_FUNCS_ONCE(gettimeofday)
+  AC_CHECK_FUNCS_ONCE(gettimeofday nanotime)
 ])