diff --git a/interpreter.go b/interpreter.go
index bd9d2c1..07ee79d 100644
--- a/interpreter.go
+++ b/interpreter.go
@@ -287,6 +287,9 @@ type interpreter struct {
 
 	evalHook EvalHook
 
+	profilerOpts StackProfilerOpts
+}
+
 type StackProfilerOpts struct {
 	//
 	stackProfileOut *bufio.Writer