diff --git a/go/types/check.go b/go/types/check.go
index 3c14f3e3..83c81d08 100644
--- a/go/types/check.go
+++ b/go/types/check.go
@@ -16,7 +16,7 @@ import (
 
 // debugging/development support
 const (
-	debug = true  // leave on during development
+	debug = false // leave on during development
 	trace = false // turn on for detailed type resolution traces
 )