various debugging
diff --git a/include/venti.h b/include/venti.h
index 8c58ab3..fb8f6c4 100644
--- a/include/venti.h
+++ b/include/venti.h
@@ -446,6 +446,9 @@
 int vtfilesetsize(VtFile*, uvlong);
 int vtfileremove(VtFile*);
 
+extern int chattyventi;
+extern int ventidoublechecksha1;
+
 #if defined(__cplusplus)
 }
 #endif