diff --git a/pkg/sinker/examples/log/Makefile b/pkg/sinker/examples/log/Makefile
index 0850b8dc..e94cbff6 100644
--- a/pkg/sinker/examples/log/Makefile
+++ b/pkg/sinker/examples/log/Makefile
@@ -10,7 +10,7 @@ image-push: build
 	docker buildx build -t "quay.io/numaio/numaflow-go/sink-log:${TAG}" --platform linux/amd64,linux/arm64 --target log . --push
 
 .PHONY: image
-imageimage: build
+image: build
 	docker build -t "quay.io/numaio/numaflow-go/sink-log:${TAG}" --target log .
 	@if [ "$(PUSH)" = "true" ]; then docker push "quay.io/numaio/numaflow-go/sink-log:${TAG}"; fi
 
diff --git a/pkg/sinker/examples/log/main.go b/pkg/sinker/examples/log/main.go
index 89f18a76..1f7c1156 100644
--- a/pkg/sinker/examples/log/main.go
+++ b/pkg/sinker/examples/log/main.go
@@ -20,6 +20,8 @@ func (l *logSink) Sink(ctx context.Context, datumStreamCh <-chan sinksdk.Datum)
 		fmt.Println("User Defined Sink:", string(d.Value()))
 		id := d.ID()
 		result = result.Append(sinksdk.ResponseOK(id))
+		// if we are not able to write to sink and if we have a fallback sink configured
+		// we can use sinksdk.ResponseFallback(id)) to write the message to fallback sink
 	}
 	return result
 }
diff --git a/pkg/sinker/options.go b/pkg/sinker/options.go
index 837ee830..34dbcd81 100644
--- a/pkg/sinker/options.go
+++ b/pkg/sinker/options.go
@@ -15,7 +15,7 @@ func defaultOptions() *options {
 	defaultPath := serverInfoFilePath
 	defaultAddress := address
 
-	if os.Getenv(EnvUDContainerType) == UDContainerFallbackSink {
+	if os.Getenv(EnvUDContaclinerType) == UDContainerFallbackSink {
 		defaultPath = fbServerInfoFilePath
 		defaultAddress = fbAddress
 	}
diff --git a/pkg/sinker/service.go b/pkg/sinker/service.go
index c23d73ee..d6dc09b2 100644
--- a/pkg/sinker/service.go
+++ b/pkg/sinker/service.go
@@ -18,8 +18,8 @@ const (
 	fbAddress               = "/var/run/numaflow/fb-sink.sock"
 	serverInfoFilePath      = "/var/run/numaflow/sinker-server-info"
 	fbServerInfoFilePath    = "/var/run/numaflow/fb-sinker-server-info"
-	EnvUDContainerType      = "EnvUDContainerType"
-	UDContainerFallbackSink = "fb-sink"
+	EnvUDContaclinerType    = "NUMAFLOW_UD_CONTAINER_TYPE"
+	UDContainerFallbackSink = "fb-udsink"
 )
 
 // handlerDatum implements the Datum interface and is used in the sink functions.