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-rw-r--r--ext/socket/socket.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/ext/socket/socket.c b/ext/socket/socket.c
index abce61307a..33b47451fd 100644
--- a/ext/socket/socket.c
+++ b/ext/socket/socket.c
@@ -826,7 +826,10 @@ sock_sysaccept(VALUE sock)
static VALUE
sock_gethostname(VALUE obj)
{
- char buf[1024];
+#ifndef HOST_NAME_MAX
+# define HOST_NAME_MAX 1024
+#endif
+ char buf[HOST_NAME_MAX+1];
rb_secure(3);
if (gethostname(buf, (int)sizeof buf - 1) < 0)