diff --git a/src/interpreter.cpp b/src/interpreter.cpp
index 5d22b6b..aff5bcc 100644
--- a/src/interpreter.cpp
+++ b/src/interpreter.cpp
@@ -15,6 +15,12 @@
     {
         return data.m_value;
     }
+
+    std::string operator()(const binary_& data) const
+    {
+        return data.m_value;
+    }
+
     template <typename T>
     std::string operator()(const T& data) const
     {