diff --git a/runtime/interpreter/interpreter_common.h b/runtime/interpreter/interpreter_common.h
index f8858d0..fa03fc7 100644
--- a/runtime/interpreter/interpreter_common.h
+++ b/runtime/interpreter/interpreter_common.h
@@ -21,6 +21,7 @@
 
 #include <math.h>
 
+#include <iostream>
 #include <sstream>
 
 #include "base/logging.h"