diff --git a/coregrind/core.h b/coregrind/core.h
index 6ef73b3..6a84840 100644
--- a/coregrind/core.h
+++ b/coregrind/core.h
@@ -226,6 +226,7 @@
    enum {
       VgLogTo_Fd,
       VgLogTo_File,
+      VgLogTo_FileExactly,
       VgLogTo_Socket
    } VgLogTo;