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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 f61102c80..678411287 100644
--- a/configure.ac
+++ b/configure.ac
@@ -71,6 +71,7 @@ AC_PROG_CC_STDC
AC_GNU_SOURCE
AC_CANONICAL_HOST
AC_C_CONST
+AC_C_VOLATILE
AC_C_BIGENDIAN
dnl libtool-2