diff --git a/ports/g2o/vcpkg.json b/ports/g2o/vcpkg.json
index 128565693a4b55..ca0000d3fd7b42 100644
--- a/ports/g2o/vcpkg.json
+++ b/ports/g2o/vcpkg.json
@@ -1,6 +1,7 @@
 {
   "name": "g2o",
   "version-date": "2024-12-14",
+  "port-version": 1,
   "description": "g2o: A General Framework for Graph Optimization",
   "homepage": "https://openslam.org/g2o.html",
   "dependencies": [