diff --git a/src/ex_cmds2.c b/src/ex_cmds2.c
index 6c919ff..715bf99 100644
--- a/src/ex_cmds2.c
+++ b/src/ex_cmds2.c
@@ -2152,7 +2152,7 @@
 fopen_noinh_readbin(filename)
     char    *filename;
 {
-    int	fd_tmp = open(filename, O_RDONLY | O_BINARY | O_NOINHERIT);
+    int	fd_tmp = mch_open(filename, O_RDONLY | O_BINARY | O_NOINHERIT, 0);
 
     if (fd_tmp == -1)
 	return NULL;