diff --git a/cmd/mtwebmapper/main.go b/cmd/mtwebmapper/main.go
index 4edd209..22f14c6 100644
--- a/cmd/mtwebmapper/main.go
+++ b/cmd/mtwebmapper/main.go
@@ -78,6 +78,9 @@ func main() {
 	subBaseLine := newSubBaseLine(mapDir)
 	router.Path("/map/{z:[0-9]+}/{x:[0-9]+}/{y:[0-9]+}.png").Handler(subBaseLine)
 
+	// TODO: Implement me!
+	var btu baseTilesUpdates
+
 	if redisHost != "" {
 		var colors *common.Colors
 		var err error
@@ -92,7 +95,13 @@ func main() {
 		}
 
 		tu := newTileUpdater(
-			mapDir, redisAddress, allowedUpdateIps, colors, transparent, workers)
+			mapDir,
+			redisAddress,
+			allowedUpdateIps,
+			colors,
+			transparent,
+			workers,
+			btu)
 		go tu.doUpdates()
 		router.Path("/update").Methods("POST").Handler(tu)
 	}
diff --git a/cmd/mtwebmapper/tilesupdater.go b/cmd/mtwebmapper/tilesupdater.go
index a0b07d4..6277d52 100644
--- a/cmd/mtwebmapper/tilesupdater.go
+++ b/cmd/mtwebmapper/tilesupdater.go
@@ -24,8 +24,13 @@ import (
 	"bitbucket.org/s_l_teichmann/mtsatellite/common"
 )
 
+type baseTilesUpdates interface {
+	BaseTilesUpdated(map[xz]bool)
+}
+
 type tileUpdater struct {
 	changes      map[xz]bool
+	btu          baseTilesUpdates
 	mapDir       string
 	redisAddress string
 	ips          []net.IP
@@ -67,9 +72,11 @@ func newTileUpdater(
 	ips []net.IP,
 	colors *common.Colors,
 	transparent bool,
-	workers int) *tileUpdater {
+	workers int,
+	btu baseTilesUpdates) *tileUpdater {
 
 	tu := tileUpdater{
+		btu:          btu,
 		mapDir:       mapDir,
 		redisAddress: redisAddress,
 		ips:          ips,
@@ -166,7 +173,7 @@ func (tu *tileUpdater) doUpdates() {
 
 		parentJobs := make(map[xz]uint16)
 
-		for c, _ := range changes {
+		for c := range changes {
 			//log.Printf("job: %+v", c)
 			jobs <- c
 			pxz := c.parent()
@@ -191,6 +198,10 @@ func (tu *tileUpdater) doUpdates() {
 			done.Wait()
 			parentJobs = ppJobs
 		}
+
+		if tu.btu != nil {
+			tu.btu.BaseTilesUpdated(changes)
+		}
 	}
 }