diff --git a/lib/getopt.c b/lib/getopt.c
index 1d14b245..f8fc003d 100644
--- a/lib/getopt.c
+++ b/lib/getopt.c
@@ -29,7 +29,9 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <unistd.h>
+#ifndef _MSC_VER
+# include <unistd.h>
+#endif
 
 #ifdef __VMS
 # include <unixlib.h>
diff --git a/lib/getopt.in.h b/lib/getopt.in.h
index ea77e3d7..c50dda00 100644
--- a/lib/getopt.in.h
+++ b/lib/getopt.in.h
@@ -34,7 +34,9 @@
 #if defined __GETOPT_PREFIX && !defined __need_getopt
 # include <stdlib.h>
 # include <stdio.h>
-# include <unistd.h>
+# ifndef _MSC_VER
+#  include <unistd.h>
+# endif
 # undef __need_getopt
 # undef getopt
 # undef getopt_long
diff --git a/src/xz/private.h b/src/xz/private.h
index 8a2db9ff..57606cd6 100644
--- a/src/xz/private.h
+++ b/src/xz/private.h
@@ -21,7 +21,10 @@
 #include <signal.h>
 #include <locale.h>
 #include <stdio.h>
-#include <unistd.h>
+
+#ifndef _MSC_VER
+#	include <unistd.h>
+#endif
 
 #include "tuklib_gettext.h"
 #include "tuklib_progname.h"
diff --git a/src/xzdec/xzdec.c b/src/xzdec/xzdec.c
index c1bd1998..95a412f4 100644
--- a/src/xzdec/xzdec.c
+++ b/src/xzdec/xzdec.c
@@ -16,7 +16,10 @@
 #include <stdarg.h>
 #include <errno.h>
 #include <stdio.h>
-#include <unistd.h>
+
+#ifndef _MSC_VER
+#	include <unistd.h>
+#endif
 
 #include "getopt.h"
 #include "tuklib_progname.h"