diff --git a/src/os.h b/src/os.h
index 4a89c66..1953a72 100644
--- a/src/os.h
+++ b/src/os.h
@@ -143,34 +143,6 @@ typedef char* slot_t;	/* used internally in utmp.c */
 # define FNBLOCK O_NONBLOCK
 #endif
 
-
-/*****************************************************************
- *    Wait stuff
- */
-
-# include <sys/wait.h>
-
-#ifndef WTERMSIG
-# define WTERMSIG(status) (status & 0177)
-#endif
-
-#ifndef WSTOPSIG
-# define WSTOPSIG(status) ((status >> 8) & 0377)
-#endif
-
-/* NET-2 uses WCOREDUMP */
-#if defined(WCOREDUMP) && !defined(WIFCORESIG)
-# define WIFCORESIG(status) WCOREDUMP(status)
-#endif
-
-#ifndef WIFCORESIG
-# define WIFCORESIG(status) (status & 0200)
-#endif
-
-#ifndef WEXITSTATUS
-# define WEXITSTATUS(status) ((status >> 8) & 0377)
-#endif
-
 /*****************************************************************
  *    user defineable stuff
  */
diff --git a/src/screen.c b/src/screen.c
index a0342f1..7be7ab2 100644
--- a/src/screen.c
+++ b/src/screen.c
@@ -43,6 +43,7 @@
 #include <sys/ioctl.h>
 #include <sys/stat.h>
 #include <sys/types.h>
+#include <sys/wait.h>
 #include <limits.h>
 
 #include <locale.h>
diff --git a/src/window.c b/src/window.c
index bc2d2c7..cefb82b 100644
--- a/src/window.c
+++ b/src/window.c
@@ -40,6 +40,7 @@
 #include <stdbool.h>
 #include <fcntl.h>
 #include <sys/ioctl.h>
+#include <sys/wait.h>
 
 #include "fileio.h"
 #include "help.h"