1 files changed, 6 insertions, 0 deletions
diff --git a/h/sysdep.h b/h/sysdep.h
index 0d9dfa7..81accf8 100644
--- a/h/sysdep.h
+++ b/h/sysdep.h
@@ -22,7 +22,13 @@
 #include <signal.h>
 #include <syslog.h>
 #ifdef HAVE_UNISTD_H
+#ifdef HAVE_GETSID
+#define __USE_XOPEN_EXTENDED
+#endif
 #include <unistd.h>
+#ifdef __USE_XOPEN_EXTENDED
+#undef __USE_XOPEN_EXTENDED
+#endif
 #endif
 #include <sys/types.h>
 #include <sys/stat.h>