diff --git a/resource-discovery/src/main/java/eu/nebulous/resource/discovery/broker_communication/SALCommunicator.java b/resource-discovery/src/main/java/eu/nebulous/resource/discovery/broker_communication/SALCommunicator.java
index 6513596..526525e 100644
--- a/resource-discovery/src/main/java/eu/nebulous/resource/discovery/broker_communication/SALCommunicator.java
+++ b/resource-discovery/src/main/java/eu/nebulous/resource/discovery/broker_communication/SALCommunicator.java
@@ -148,7 +148,7 @@ public static String get_device_deregistration_json(Device device){
         return root_json_object.toJSONString();
     }
 
-    public static String get_device_registration_json(String internal_ip_address, String external_ip_address, int external_access_port, String os_family, String os_architecture, String jar_url, int os_version, int cpu_cores, long ram_gb, long disk_gb, String device_name,Double price, String provider_id, String city_name, String country_name, String device_username, String device_password, String private_key, double device_longitude, double device_latitude) {
+    public static String get_device_registration_json(String internal_ip_address, String external_ip_address, int external_access_port, String os_family, String os_architecture, String jar_url, int os_version, int cpu_cores, long ram_gb, long disk_gb, int number_of_gpus, String device_name,Double price, String provider_id, String city_name, String country_name, String device_username, String device_password, String private_key, double device_longitude, double device_latitude) {
 
             JSONObject root_json_object = new JSONObject();
             JSONObject loginCredential = new JSONObject();
@@ -186,6 +186,7 @@ public static String get_device_registration_json(String internal_ip_address, St
             nodeProperties.put("ram", ram_gb);
             nodeProperties.put("disk", disk_gb);
             nodeProperties.put("price", price);
+            nodeProperties.put("gpu", number_of_gpus);
             nodeProperties.put("operatingSystem", operatingSystem);
             nodeProperties.put("geoLocation", geoLocation);
 
diff --git a/resource-discovery/src/main/java/eu/nebulous/resource/discovery/registration/service/SALRegistrationService.java b/resource-discovery/src/main/java/eu/nebulous/resource/discovery/registration/service/SALRegistrationService.java
index ef28ba3..7d3faf0 100644
--- a/resource-discovery/src/main/java/eu/nebulous/resource/discovery/registration/service/SALRegistrationService.java
+++ b/resource-discovery/src/main/java/eu/nebulous/resource/discovery/registration/service/SALRegistrationService.java
@@ -75,6 +75,7 @@ public String register(Device device) {
         String device_name = device.getRef();
         Double price = device.getPrice();
 
+        int number_of_gpus = 0;
         int cores = Integer.parseInt(device_info.get("CPU_PROCESSORS"));
         long ram_mb = Math.round(Integer.parseInt(device_info.get("RAM_TOTAL_KB"))*1.0/1000);
         long disk_mb = Math.round(Integer.parseInt(device_info.get("DISK_TOTAL_KB"))*1.0/1000);
@@ -121,7 +122,7 @@ public String register(Device device) {
         //register_device_message.put("timestamp",(int)(clock.millis()/1000));
 
 
-        String register_device_message_string = get_device_registration_json(internal_ip,external_ip_address,external_access_port,os_family,os_architecture,jar_url,os_version,cores,ram_mb,disk_mb,device_name,price,provider_id,city_name,country_name, device_username, device_password,private_key,device_longitude, device_latitude);
+        String register_device_message_string = get_device_registration_json(internal_ip,external_ip_address,external_access_port,os_family,os_architecture,jar_url,os_version,cores,ram_mb,disk_mb,number_of_gpus,device_name,price,provider_id,city_name,country_name, device_username, device_password,private_key,device_longitude, device_latitude);
         log.info("topic is {}", get_registration_topic_name(application_name));
         log.info("broker ip is {}", processorProperties.getNebulous_broker_ip_address());
         log.info("broker port is {}", processorProperties.getNebulous_broker_port());