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-rw-r--r--configure.ac1
1 files changed, 1 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac
index 15154b3414..416215836e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -191,6 +191,7 @@ AM_CONDITIONAL(USE_FW_HELPER, test x$natpmp = xtrue || test x$upnp = xtrue)
AM_CONDITIONAL(NAT_PMP, test x$natpmp = xtrue)
AM_CONDITIONAL(MINIUPNPC, test x$upnp = xtrue)
AM_PROG_CC_C_O
+AC_PROG_CC_C99
AC_ARG_VAR(PYTHON)
AC_CHECK_PROGS(PYTHON, [python python2 python2.7 python3 python3.3])