diff --git a/src/mbyte.c b/src/mbyte.c
index abdb9e8..d057266 100644
--- a/src/mbyte.c
+++ b/src/mbyte.c
@@ -161,7 +161,7 @@
 	return;
     if (fd == NULL)
     {
-	fd = fopen("xim.log", "w");
+	fd = mch_fopen("xim.log", "w");
 	if (fd == NULL)
 	{
 	    EMSG("Cannot open xim.log");