diff --git a/autoconf/configure.ac b/autoconf/configure.ac
index 49010c4e4c4..3a3dfd881c0 100644
--- a/autoconf/configure.ac
+++ b/autoconf/configure.ac
@@ -282,7 +282,7 @@ then
 fi
 AC_HEADER_MMAP_ANONYMOUS
 AC_TYPE_SIGNAL
-AC_CHECK_FUNCS(getcwd gettimeofday strdup strtoq strtoll backtrace)
+AC_CHECK_FUNCS(getcwd gettimeofday strdup strtoq strtoll backtrace isatty)
 AC_CHECK_FUNC(mprotect,,AC_MSG_ERROR([Function mprotect() required but not found]))
 
 dnl Determine if the linker supports the -R option.