Fix bug in macro.

diff --git a/gettext-tools/m4/error.m4 b/gettext-tools/m4/error.m4
index 1bd04b1710a0c05ef72fca7d69e63759bf5ffbfd..eb97cfb9efffffaa5ca8e08b7e76665da3c6b857 100644 (file)
--- a/gettext-tools/m4/error.m4
+++ b/gettext-tools/m4/error.m4
@@ -26,7 +26,7 @@ AC_DEFUN([gt_FUNC_ERROR_AT_LINE],
 AC_DEFUN([jm_PREREQ_ERROR],
 [
   AC_REQUIRE([AC_HEADER_STDC])
-  AC_CHECK_FUNCS_ONCE(doprnt vprintf)
+  AC_REQUIRE([AC_FUNC_VPRINTF])
   AC_CHECK_FUNCS(strerror)
   AC_CHECK_DECLS([strerror])
   AC_FUNC_STRERROR_R