diff --git a/include/json_html_serializer.hpp b/include/json_html_serializer.hpp
index a7d5297..174b086 100644
--- a/include/json_html_serializer.hpp
+++ b/include/json_html_serializer.hpp
@@ -588,6 +588,11 @@
             out += "null";
             return;
         }
+        case nlohmann::json::value_t::binary:
+        {
+            // Do nothing;  Should never happen.
+            return;
+        }
     }
 }