diff --git a/panda/src/express/config_express.N b/panda/src/express/config_express.N
index 9ebe60202d..e80c7b93af 100644
--- a/panda/src/express/config_express.N
+++ b/panda/src/express/config_express.N
@@ -6,3 +6,7 @@ forcetype NotifySeverity
 
 forcetype ConfigExpress
 renametype ConfigExpress ConfigExpress
+
+forcetype istream
+forcetype ostream
+forcetype iostream