diff --git a/hardware_interface.h b/hardware_interface.h
index 29baec4..58157d0 100644
--- a/hardware_interface.h
+++ b/hardware_interface.h
@@ -6,6 +6,7 @@
 #define CHROMEOS_PLATFORM_UPDATE_ENGINE_HARDWARE_INTERFACE_H__
 
 #include <string>
+#include <vector>
 
 namespace chromeos_update_engine {
 
@@ -23,6 +24,9 @@
   // Returns the currently booted rootfs partition. "/dev/sda3", for example.
   virtual const std::string BootDevice() = 0;
 
+  // Returns a list of all kernel partitions available (whether bootable or not)
+  virtual std::vector<std::string> GetKernelDevices() = 0;
+
   // Is the specified kernel partition currently bootable, based on GPT flags?
   // Returns success.
   virtual bool IsKernelBootable(const std::string& kernel_device,