diff --git a/src/internal/mana_lib.hpp b/src/internal/mana_lib.hpp
index 751dc53..ebba36d 100644
--- a/src/internal/mana_lib.hpp
+++ b/src/internal/mana_lib.hpp
@@ -109,6 +109,11 @@ inline nlohmann::json make_array_descriptor(const std::string &name, mana_data_t
     j["data_type"] = data_type;
     j["size"] = size;
     j["bits"] = bits;
+    if (bits != 0)
+    {
+        j["lower_limit"] = 0u;
+        j["upper_limit"] = 1lu << bits;
+    }
     return j;
 }