diff -up ajam-2.5.2-1.3.3/execunix.c.include ajam-2.5.2-1.3.3/execunix.c
--- ajam-2.5.2-1.3.3/execunix.c.include	2012-06-22 17:53:16.769405802 +0200
+++ ajam-2.5.2-1.3.3/execunix.c	2012-06-22 17:59:09.697662990 +0200
@@ -42,6 +42,10 @@
 # include "lists.h"
 # include "execcmd.h"
 # include <errno.h>
+# include <unistd.h>
+# include <sys/types.h>
+# include <sys/wait.h>
+
 
 # ifdef USE_EXECUNIX
 
diff -up ajam-2.5.2-1.3.3/fileunix.c.include ajam-2.5.2-1.3.3/fileunix.c
--- ajam-2.5.2-1.3.3/fileunix.c.include	2012-06-22 17:53:56.998694847 +0200
+++ ajam-2.5.2-1.3.3/fileunix.c	2012-06-22 17:54:41.828845967 +0200
@@ -51,12 +51,12 @@
 #   include <sys/stat.h>
 # endif
 
+# include <unistd.h>
 # if defined( OS_RHAPSODY ) || \
      defined( OS_MACOSX ) || \
      defined( OS_NEXT )
 /* need unistd for rhapsody's proper lseek */
 # include <sys/dir.h>
-# include <unistd.h>
 # define STRUCT_DIRENT struct direct 
 # else
 # include <dirent.h>
diff -up ajam-2.5.2-1.3.3/make1.c.include ajam-2.5.2-1.3.3/make1.c
--- ajam-2.5.2-1.3.3/make1.c.include	2012-06-22 17:59:36.178959199 +0200
+++ ajam-2.5.2-1.3.3/make1.c	2012-06-22 18:00:04.299195472 +0200
@@ -50,6 +50,7 @@
  */
 
 # include "jam.h"
+# include <unistd.h>
 
 # include "lists.h"
 # include "parse.h"