diff --git a/pkg/common/startrpc/start.go b/pkg/common/startrpc/start.go
index d5e31701e6..f33fc7108e 100644
--- a/pkg/common/startrpc/start.go
+++ b/pkg/common/startrpc/start.go
@@ -100,7 +100,7 @@ func Start(
 			// Create a HTTP server for prometheus.
 			httpServer := &http.Server{Handler: promhttp.HandlerFor(reg, promhttp.HandlerOpts{}), Addr: fmt.Sprintf("0.0.0.0:%d", prometheusPort)}
 			if err := httpServer.ListenAndServe(); err != nil {
-				log.Fatal("Unable to start a http server.")
+				log.Fatal("Unable to start a http server.", err)
 			}
 		}
 	}()