diff --git a/include/extractor/edge_based_node.hpp b/include/extractor/edge_based_node.hpp
index f6c6f8e81..073f4202e 100644
--- a/include/extractor/edge_based_node.hpp
+++ b/include/extractor/edge_based_node.hpp
@@ -12,10 +12,12 @@ struct EdgeBasedNode
 {
     GeometryID geometry_id;
     ComponentID component_id;
-    AnnotationID annotation_id;
-    bool segregated;
+    AnnotationID annotation_id : 31;
+    bool segregated : 1;
 };
 
+static_assert(sizeof(EdgeBasedNode) == 3 * 4, "Should be 3 * sizeof(uint32_t)");
+
 } // namespace extractor
 } // namespace osrm