diff --git a/testcode/lib/ft.c b/testcode/lib/ft.c
index c887e1c87..efbab3627 100644
--- a/testcode/lib/ft.c
+++ b/testcode/lib/ft.c
@@ -20,6 +20,7 @@
 #include <fcntl.h>
 #include <errno.h>
 #include <conio.h>
+#include <unistd.h>
 
 extern int getsp(void);  /* is provided in getsp.s */
 
diff --git a/testcode/lib/posixio-test.c b/testcode/lib/posixio-test.c
index eaa60d357..26d416a58 100644
--- a/testcode/lib/posixio-test.c
+++ b/testcode/lib/posixio-test.c
@@ -1,7 +1,7 @@
 #include <stdio.h>
 #include <errno.h>
 #include <fcntl.h>
-
+#include <unistd.h>
 
 
 int Open (const char* Name, int Flags)