diff --git a/gzguts.h b/gzguts.h
index a909e337..bd0a6fe2 100644
--- a/gzguts.h
+++ b/gzguts.h
@@ -40,6 +40,7 @@
 
 #if defined(__TURBOC__) || defined(_MSC_VER) || defined(_WIN32)
 #  include <io.h>
+#  include <share.h>
 #  include <sys/stat.h>
 #endif