diff --git a/src/Logic/OfflineBasemapManager.ts b/src/Logic/OfflineBasemapManager.ts
index d2e59eb82..e1c5828d7 100644
--- a/src/Logic/OfflineBasemapManager.ts
+++ b/src/Logic/OfflineBasemapManager.ts
@@ -248,7 +248,7 @@ export class OfflineBasemapManager {
             const y = tile.y >> zDiff
             if (!this.isInstalled({ z, x, y })) {
                 yield <AreaDescription>{
-                    name: `${z}-${x}-${y}.pmtiles`,
+                    name: `${z}/${x}/${y}.pmtiles`,
                     minzoom: z,
                     maxzoom: OfflineBasemapManager.zoomelevels[z] ?? 15,
                     x,