diff --git a/src/if_cscope.c b/src/if_cscope.c
index f921965..aef48d0 100644
--- a/src/if_cscope.c
+++ b/src/if_cscope.c
@@ -22,7 +22,7 @@
 # include <sys/wait.h>
 #else
     /* not UNIX, must be WIN32 */
-# include <io.h>
+# include "vimio.h"
 # include <fcntl.h>
 # include <process.h>
 # define STDIN_FILENO    0