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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 cb06555..9ede095 100644
--- a/configure.ac
+++ b/configure.ac
@@ -30,6 +30,7 @@ AM_CONDITIONAL([IN_GIT],
AC_PROG_CC()
AM_PROG_CC_C_O()
+AC_PROG_CC_C99()
AX_CFLAGS_WARN_ALL() dnl Adds -Wall or equivalent
AX_CHECK_COMPILE_FLAG([-Wpedantic], [AX_APPEND_FLAG([-Wpedantic])])