diff --git a/metricsd/constants.h b/metricsd/constants.h
index 7e1e116..3a7569b 100644
--- a/metricsd/constants.h
+++ b/metricsd/constants.h
@@ -30,6 +30,10 @@
 // Build time properties name.
 static const char kProductId[] = "product_id";
 static const char kProductVersion[] = "product_version";
+
+// Weave configuration.
+static const char kWeaveConfigurationFile[] = "/system/etc/weaved/weaved.conf";
+static const char kModelManifestId[] = "model_id";
 }  // namespace metrics
 
 #endif  // METRICS_CONSTANTS_H_
diff --git a/metricsd/uploader/system_profile_cache.cc b/metricsd/uploader/system_profile_cache.cc
index 1995510..f7060a2 100644
--- a/metricsd/uploader/system_profile_cache.cc
+++ b/metricsd/uploader/system_profile_cache.cc
@@ -108,7 +108,18 @@
   profile_.client_id = testing_ ?
       "client_id_test" :
       GetPersistentGUID(guid_path);
-  profile_.hardware_class = "unknown";
+  profile_.model_manifest_id = "unknown";
+  if (!testing_) {
+    brillo::KeyValueStore weave_config;
+    if (!weave_config.Load(base::FilePath(metrics::kWeaveConfigurationFile))) {
+      LOG(ERROR) << "Failed to load the weave configuration file.";
+    } else if (!weave_config.GetString(metrics::kModelManifestId,
+                                       &profile_.model_manifest_id)) {
+      LOG(ERROR) << "The model manifest id (model_id) is undefined in "
+                 << metrics::kWeaveConfigurationFile;
+    }
+  }
+
   profile_.channel = ProtoChannelFromString(channel);
 
   // Increment the session_id everytime we initialize this. If metrics_daemon
@@ -143,7 +154,7 @@
   metrics::SystemProfileProto* profile_proto =
       metrics_proto->mutable_system_profile();
   profile_proto->mutable_hardware()->set_hardware_class(
-      profile_.hardware_class);
+      profile_.model_manifest_id);
   profile_proto->set_app_version(profile_.version);
   profile_proto->set_channel(profile_.channel);
   metrics::SystemProfileProto_BrilloDeviceData* device_data =
diff --git a/metricsd/uploader/system_profile_cache.h b/metricsd/uploader/system_profile_cache.h
index 97fb33a..ae54a2a 100644
--- a/metricsd/uploader/system_profile_cache.h
+++ b/metricsd/uploader/system_profile_cache.h
@@ -35,7 +35,7 @@
 
 struct SystemProfile {
   std::string version;
-  std::string hardware_class;
+  std::string model_manifest_id;
   std::string client_id;
   int session_id;
   metrics::SystemProfileProto::Channel channel;
diff --git a/metricsd/uploader/upload_service.h b/metricsd/uploader/upload_service.h
index a4d0a1e..77df74b 100644
--- a/metricsd/uploader/upload_service.h
+++ b/metricsd/uploader/upload_service.h
@@ -46,8 +46,8 @@
 //
 // The two states are the presence or not of a staged log.
 // A staged log is a compressed protobuffer containing both the aggregated
-// metrics and event and information about the client. (product, hardware id,
-// etc...).
+// metrics and event and information about the client. (product,
+// model_manifest_id, etc...).
 //
 // At regular intervals, the upload event will be triggered and the following
 // will happen: