diff --git a/configure.ac b/configure.ac
index 9c0fd9dfa9b42e3eb5344c92ef6b74a296d59b2a..57e7bb5ea0c76dfaa8aa9f6d09328238341827d2 100644 (file)
--- a/configure.ac
+++ b/configure.ac
AM_CONFIG_HEADER([config.h])
dnl Check for programs
-AC_PROG_CC
+AC_PROG_CC_C99
AC_PROG_INSTALL
dnl AC_PROG_LIBTOOL
AC_PROG_LIBTOOL