1 files changed, 1 insertions, 1 deletions

diff --git a/configure.ac b/configure.ac
index ccaaa63..07d5e76 100644
--- a/configure.ac
+++ b/configure.ac
@@ -15,7 +15,7 @@ case $host_os in
                 ;;
         *linux*)
                 HOST_OS=linux;
-                CFLAGS="$CFLAGS -D_BSD_SOURCE -D_POSIX_SOURCE -D_GNU_SOURCE"
+                CFLAGS="$CFLAGS -D_DEFAULT_SOURCE -D_BSD_SOURCE -D_POSIX_SOURCE -D_GNU_SOURCE"
                 ;;
         *solaris*)
                 HOST_OS=solaris;