getsubopt() is in unistd.h, not stdlib.h (error in xBSD manuals).

1 files changed, 1 insertions, 0 deletions

diff --git a/html.c b/html.c
index 1c7e8ab4..a5133932 100644
--- a/html.c
+++ b/html.c
@@ -23,6 +23,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 
 #include "chars.h"
 #include "mdoc.h"