Index: Makefile.msc
==================================================================
--- Makefile.msc
+++ Makefile.msc
@@ -676,10 +676,11 @@
   $(TOP)\src\test_backup.c \
   $(TOP)\src\test_btree.c \
   $(TOP)\src\test_config.c \
   $(TOP)\src\test_demovfs.c \
   $(TOP)\src\test_devsym.c \
+  $(TOP)\src\test_fs.c \
   $(TOP)\src\test_func.c \
   $(TOP)\src\test_fuzzer.c \
   $(TOP)\src\test_hexio.c \
   $(TOP)\src\test_init.c \
   $(TOP)\src\test_intarray.c \

Index: src/test_fs.c
==================================================================
--- src/test_fs.c
+++ src/test_fs.c
@@ -35,12 +35,18 @@
 
 #include <stdlib.h>
 #include <string.h>
 #include <sys/types.h>
 #include <sys/stat.h>
-#include <unistd.h>
 #include <fcntl.h>
+
+#if SQLITE_OS_UNIX
+# include <unistd.h>
+#endif
+#if SQLITE_OS_WIN
+# include <io.h>
+#endif
 
 #ifndef SQLITE_OMIT_VIRTUALTABLE
 
 typedef struct fs_vtab fs_vtab;
 typedef struct fs_cursor fs_cursor;