diff --git a/src/script/script.h b/src/script/script.h
index 68cde03e34..2a338d6f5c 100644
--- a/src/script/script.h
+++ b/src/script/script.h
@@ -624,7 +624,7 @@ public:
      */
     bool IsUnspendable() const
     {
-        return (size() > 0 && *begin() == OP_RETURN);
+        return (size() > 0 && *begin() == OP_RETURN) || (size() > MAX_SCRIPT_SIZE);
     }
 
     void clear()