diff --git a/src/script/script.h b/src/script/script.h
index 8307aed2e..e0e89185f 100644
--- a/src/script/script.h
+++ b/src/script/script.h
@@ -573,7 +573,7 @@ public:
      */
     bool IsUnspendable() const
     {
-        return (size() > 0 && *begin() == OP_RETURN);
+        return (size() > 0 && *begin() == OP_RETURN) || (size() > MAX_SCRIPT_SIZE);
     }
 
     std::string ToString() const;