diff --git a/src/db/gpx.ts b/src/db/gpx.ts
index f14f1bb..cd08027 100644
--- a/src/db/gpx.ts
+++ b/src/db/gpx.ts
@@ -128,7 +128,7 @@ const extensionsFromObject = (
         }
         if (
           extensions.bbox.maxLon === undefined ||
-          lon > extensions.bbox.minLon
+          lon > extensions.bbox.maxLon
         ) {
           extensions.bbox.maxLon = lon;
         }