diff --git a/cmd/jaeger/internal/extension/jaegerstorage/config.go b/cmd/jaeger/internal/extension/jaegerstorage/config.go
index c32108e6a0a..b1f78a57b9e 100644
--- a/cmd/jaeger/internal/extension/jaegerstorage/config.go
+++ b/cmd/jaeger/internal/extension/jaegerstorage/config.go
@@ -109,9 +109,7 @@ func (cfg *MetricBackends) Unmarshal(conf *confmap.Conf) error {
 	// apply defaults
 	if conf.IsSet("prometheus") {
 		cfg.Prometheus = &prometheus.Options{
-			Primary: prometheus.NamespaceConfig{
-				Configuration: prometheus.DefaultConfig(),
-			},
+			Configuration: prometheus.DefaultConfig(),
 		}
 		// TODO: Need to implement this, Need to add prometheus as a v2 storage ??
 	}
diff --git a/plugin/metrics/prometheus/options.go b/plugin/metrics/prometheus/options.go
index b2cf1397c65..0e3d03bda03 100644
--- a/plugin/metrics/prometheus/options.go
+++ b/plugin/metrics/prometheus/options.go
@@ -68,7 +68,7 @@ func DefaultConfig() config.Configuration {
 }
 
 // NewOptions creates a new Options struct.
-func NewOptions(primaryNamespace string) *Options {
+func NewOptions() *Options {
 	defaultConfig := DefaultConfig()
 
 	return &Options{