diff --git a/psu.hpp b/psu.hpp
index d45ce7f..8407a06 100644
--- a/psu.hpp
+++ b/psu.hpp
@@ -16,9 +16,19 @@
     uint32_t delay;
 } __attribute__((packed));
 
+struct PsuResetOnShutdownRequest
+{
+    uint8_t subcommand;
+} __attribute__((packed));
+
 // Set a time-delayed PSU hard reset.
 ipmi_ret_t psuHardReset(const uint8_t* reqBuf, uint8_t* replyBuf,
                         size_t* dataLen, const HandlerInterface* handler);
 
+// Arm for PSU hard reset on host shutdown.
+ipmi_ret_t psuHardResetOnShutdown(const uint8_t* reqBuf, uint8_t* replyBuf,
+                                  size_t* dataLen,
+                                  const HandlerInterface* handler);
+
 } // namespace ipmi
 } // namespace google