diff --git a/vsphere-influxdb.go b/vsphere-influxdb.go
index 2d4df9f..d23d8d3 100644
--- a/vsphere-influxdb.go
+++ b/vsphere-influxdb.go
@@ -813,7 +813,10 @@ func main() {
 		config.InfluxDB.Password = os.Getenv("INFLUX_PASSWORD")
 		config.InfluxDB.Database = os.Getenv("INFLUX_DATABASE")
 	}
-
+	// Add a default "" value for InfluxDB prefix for retrocompatibility post PR #53
+	if config.InfluxDB.Prefix == nil {
+		config.InfluxDB.Prefix = ""
+	}
 	// Support environment variables for VSphere
 	// Currently ony one server is supported and added to the list of vSphere servers
 	if vhostname := os.Getenv("VSPHERE_HOSTNAME"); vhostname != "" {