diff --git a/client_library/client_dbus.h b/client_library/client_dbus.h
index a032d21..74fcce3 100644
--- a/client_library/client_dbus.h
+++ b/client_library/client_dbus.h
@@ -44,7 +44,7 @@
                      bool at_user_request) override;
 
   bool AttemptInstall(const std::string& omaha_url,
-                      const std::vector<std::string>& dlc_module_ids) override;
+                      const std::vector<std::string>& dlc_ids) override;
 
   bool SetDlcActiveValue(bool is_active, const std::string& dlc_id) override;
 
diff --git a/client_library/include/update_engine/client.h b/client_library/include/update_engine/client.h
index 9bda0b9..f734733 100644
--- a/client_library/include/update_engine/client.h
+++ b/client_library/include/update_engine/client.h
@@ -54,11 +54,10 @@
   //     empty indicates update_engine should use its default value. Note that
   //     update_engine will ignore this parameter in production mode to avoid
   //     pulling untrusted updates.
-  // |dlc_module_ids|
+  // |dlc_ids|
   //     A list of DLC module IDs.
-  virtual bool AttemptInstall(
-      const std::string& omaha_url,
-      const std::vector<std::string>& dlc_module_ids) = 0;
+  virtual bool AttemptInstall(const std::string& omaha_url,
+                              const std::vector<std::string>& dlc_ids) = 0;
 
   // Same as above but return the entire struct instead.
   virtual bool GetStatus(UpdateEngineStatus* out_status) const = 0;