diff --git a/include/hgp/map_util.hpp b/include/hgp/map_util.hpp
index f516523..45d765b 100644
--- a/include/hgp/map_util.hpp
+++ b/include/hgp/map_util.hpp
@@ -687,6 +687,7 @@ class MapUtil {
         }
       }
     }
+    map_initialized_ = true;
   }
 
   // ---------------- Dynamic heat-map API ----------------